Green opal is a stone of renewal and growth. Its soft green color evokes spring leaves and fresh beginnings. In spiritual practice, green opal carries gentle and healing energy.
The green opal meaning often involves emotional healing, growth, and connection to nature. It is a stone of the heart, helping to release old wounds. A spiritual meaning of green jade shares that green-stone focus, though jade carries a more protective energy.
Green opal is used in crystal healing to soothe anxiety, attract abundance, and support new beginnings. It can also symbolize hope and resilience. The stone's energy is gentle but persistent.
If you feel drawn to green opal, it may signal a need for healing. A spiritual meaning of green aventurine also deals with green stones, though aventurine carries a more luck-oriented energy.
5 Key Takeaways
- Green opal symbolizes emotional healing, renewal, compassion, and heart-centered energy.
- Many spiritual traditions connect green opal with the heart chakra and emotional balance.
- People often use green opal during meditation, grief recovery, relationship healing, and personal transformation.
- Green opal contains high water content, which makes it softer and more delicate than many gemstones.
- Wearing green opal jewelry close to the heart or skin may strengthen feelings of calm, self-awareness, and spiritual grounding.
What is Green Opal?

Green opal is a naturally occurring gemstone known for its soft green shades that range from pale mint to deep mossy green. Unlike precious opals that display strong flashes of rainbow color, green opal usually has a more calming and opaque appearance. Its beauty comes from its smooth texture, earthy tones, and tranquil visual character rather than intense brilliance.
Mineralogically, opal forms from hydrated silica. In simple terms, water carrying dissolved silica slowly settles into cracks and cavities in rocks over thousands or even millions of years. Over time, the silica hardens and creates opal deposits. Green opal gets its color from trace minerals such as nickel, iron, or chromium that become trapped during formation.
Many people confuse green opal with jade because both stones share similar shades of green and calming symbolism. However, green opal feels softer, more delicate, and slightly waxy compared to jade’s dense structure. Spiritually, green opal also carries a more emotionally fluid reputation, often linked with healing emotional wounds and encouraging openness.
Origins and Formation
Green opal forms in areas where silica-rich water repeatedly moves through rock layers. As water evaporates, it leaves behind silica deposits that slowly harden into opal. This process can take immense geological time, which adds to the stone’s symbolic connection with patience, emotional maturity, and gradual healing.
Several countries produce green opal, although certain regions have become especially well known for high-quality deposits. Australia remains one of the world’s largest opal sources, but green opal also appears in places such as Peru, Brazil, Madagascar, Ethiopia, Mexico, and the United States.
Peruvian green opal holds particular significance in spiritual communities because of its soothing color and relatively consistent appearance. Many crystal healers associate Peruvian green opal with emotional release, compassion, and gentle heart healing.
The stone’s water content plays an important role in its structure. Opals can contain up to 20 percent water, which makes them more sensitive to heat, dryness, impact, and sudden temperature changes than harder gemstones such as sapphire or quartz.
Key Properties
- Color: Light green, mint green, olive green, moss green
- Composition: Hydrated silica
- Hardness: Approximately 5.5 to 6 on the Mohs scale
- Chakra Association: Primarily the heart chakra
- Symbolism: Emotional healing, peace, compassion, renewal
- Common Sources: Peru, Australia, Madagascar, Ethiopia, Brazil
- Transparency: Opaque to translucent
- Energy Style: Gentle, calming, emotionally balancing
Historical Use
Ancient civilizations often associated opals with mystery, intuition, and divine energy. While historical records focus more heavily on white and fiery opals, green opal still appeared in ornamental carvings, spiritual objects, and healing traditions in certain regions.
Some South American traditions viewed green stones as symbols of fertility, nature, and emotional harmony. Because green opal resembles lush forests and flowing water, people often connected it with life force and emotional restoration.
In later metaphysical traditions, green opal became associated with heart-centered healing practices. Spiritual practitioners began using it during meditation, emotional counseling, grief rituals, and energy balancing work. Modern crystal enthusiasts continue many of these traditions today, particularly those involving emotional renewal and compassion.
5 Spiritual Meanings of Green Opal
1. Emotional Renewal
Green opal often carries the symbolism of emotional renewal because its energy feels closely tied to recovery, softness, and quiet rebuilding. People are frequently drawn to this stone during emotionally difficult chapters of life, especially after heartbreak, betrayal, grief, burnout, or long periods of emotional exhaustion. Unlike crystals associated with intensity or rapid transformation, green opal symbolizes healing that unfolds slowly and naturally. Its muted green color mirrors the rhythms of nature itself, where damaged landscapes gradually return to life after storms, droughts, or harsh winters.
Many spiritual traditions associate emotional suffering with trapped energy that settles deep beneath conscious awareness. A person may continue functioning outwardly while silently carrying unresolved sadness, disappointment, resentment, or emotional fatigue internally. Within crystal healing practices, green opal represents the gentle release of that hidden emotional weight. People often describe its symbolism as emotionally “cooling,” especially during moments when emotions feel overwhelming or difficult to control.
This meaning becomes particularly significant because emotional renewal rarely happens all at once. Most people do not wake up suddenly healed after painful experiences. Instead, healing usually develops through small emotional shifts. Someone may begin sleeping better, feeling calmer around certain memories, or becoming more emotionally open again after months of withdrawal. Green opal spiritually reflects this gradual process. It symbolizes the quiet return of emotional balance rather than dramatic emotional breakthroughs.
For many individuals, green opal also represents permission to soften emotionally. After painful experiences, people often become emotionally guarded in order to protect themselves from further hurt. While that instinct can feel necessary, it may also create emotional numbness or isolation over time. Spiritually, green opal is believed to encourage emotional openness without forcing vulnerability before a person feels ready. Its symbolism centers on emotional recovery that feels safe, patient, and grounded.
2. Heart Chakra Healing
In crystal traditions, green opal is strongly connected with the heart chakra, the energy center associated with love, compassion, emotional trust, forgiveness, empathy, and connection. The heart chakra sits at the emotional center of many spiritual systems because it influences how people give and receive love, process emotional pain, and form meaningful relationships with others. When this chakra feels balanced, people often experience emotional openness, healthy boundaries, emotional clarity, and a stronger sense of inner harmony. When blocked, emotional difficulties may begin surfacing in multiple areas of life.
Many spiritual practitioners believe blocked heart chakra energy can appear as resentment, fear of intimacy, emotional detachment, jealousy, bitterness, or difficulty trusting others. Sometimes emotional wounds from childhood, past relationships, or prolonged stress create protective emotional walls that slowly disconnect people from vulnerability and connection. Green opal is often used symbolically during healing work focused on reopening emotional pathways that feel closed or guarded.
Its connection to heart chakra healing feels especially meaningful because green opal does not symbolize forceful emotional exposure. Instead, many people believe it encourages emotional honesty in a softer, more manageable way. During meditation or spiritual reflection, practitioners sometimes use green opal to help create emotional calm while examining difficult feelings. This combination of emotional awareness and emotional gentleness forms a major part of the stone’s spiritual reputation.
Green opal also symbolizes forgiveness within heart-centered healing traditions. Forgiveness in spiritual contexts does not always mean approving harmful behavior or forgetting painful experiences. More often, it refers to releasing emotional heaviness that continues hurting the person carrying it. Some crystal healers believe green opal supports this process by encouraging emotional release without emotional suppression. Rather than denying pain, it symbolizes working through pain with compassion and patience.
3. Compassion and Kindness
Green opal frequently symbolizes compassion because its spiritual energy is often described as gentle, calming, and emotionally nurturing. While certain stones are associated with strength, ambition, protection, or transformation, green opal carries a noticeably softer symbolism. Its meaning centers less on pushing forward aggressively and more on creating emotional space for patience, understanding, and emotional care.
This symbolism becomes particularly important during periods when people feel emotionally depleted. Stress, disappointment, conflict, or prolonged emotional pressure can slowly reduce a person’s ability to respond to themselves or others with kindness. Many people become harsh toward themselves during difficult times, criticizing their perceived weaknesses or emotional struggles instead of recognizing their emotional exhaustion. In spiritual traditions, green opal often represents the opposite energy. It symbolizes emotional gentleness in moments when self-judgment becomes overwhelming.
Many crystal practitioners believe green opal encourages self-compassion before outward compassion can fully develop. This idea appears across multiple healing philosophies because people who constantly suppress their own emotional needs often struggle to maintain healthy emotional balance in relationships. Green opal spiritually reflects the importance of emotional care without guilt or shame.
Its symbolism also extends into interpersonal relationships. Families, romantic partnerships, and friendships frequently experience emotional tension caused by misunderstandings, defensiveness, or accumulated emotional stress. Green opal is sometimes associated with emotional patience during these situations. Rather than encouraging confrontation or emotional intensity, its energy is believed to support calmer communication and greater empathy.
4. Inner Peace
One of the strongest spiritual meanings connected with green opal involves inner peace and emotional calmness. Many people are drawn to this stone during emotionally chaotic periods when stress, anxiety, overthinking, or emotional instability begin affecting daily life. Spiritually, green opal symbolizes stillness within emotional turbulence. Its energy is commonly described as grounding, soothing, and emotionally stabilizing rather than energizing or stimulating.
Modern life often keeps people mentally overwhelmed. Constant responsibilities, emotional pressure, uncertainty, and overstimulation can create a state where the mind rarely feels quiet. Even during rest, many individuals continue replaying worries, conflicts, regrets, or fears internally. Within crystal healing traditions, green opal represents a calming emotional presence that helps reduce this sense of internal noise.
Its connection to inner peace is especially powerful because the stone symbolizes calm that develops gradually. Some spiritual symbols focus on dramatic emotional awakenings or intense breakthroughs. Green opal tends to represent something quieter. People often describe its symbolism as emotional steadiness rather than emotional excitement. This makes it particularly meaningful for those seeking emotional balance after prolonged stress or emotional burnout.
Many practitioners use green opal during meditation, mindfulness exercises, prayer, journaling, or reflective spiritual practices because they believe it helps slow emotional overactivity. The stone’s earthy green appearance reinforces this symbolism by reflecting nature’s calming qualities. Forests, plants, rain, and natural landscapes frequently create feelings of psychological calm, and green opal spiritually carries similar associations.
5. Connection With Nature
Green opal’s earthy green tones naturally connect it with themes of nature, growth, grounding, and life cycles. Across many spiritual traditions, green stones often symbolize renewal because green is strongly associated with living landscapes, fertile environments, and seasonal transformation. Green opal carries this symbolism in a softer, more introspective way, linking emotional healing with the slow rhythms found throughout nature.
Many people feel emotionally disconnected during periods of stress, grief, burnout, or personal struggle. Spiritual practices connected with nature often encourage people to reconnect with slower, more natural rhythms rather than remaining trapped in constant emotional urgency. Green opal symbolically supports this reconnection. Its energy is frequently associated with grounding, emotional patience, and awareness of life’s gradual cycles.
Nature itself rarely changes instantly. Trees take years to mature. Seasons transition slowly. Damaged landscapes recover layer by layer over time. Spiritually, green opal reflects this same principle in emotional healing. It reminds people that growth often happens quietly beneath the surface before visible transformation appears externally. This symbolism can feel comforting during periods when personal progress seems slow or uncertain.
Many crystal practitioners also associate green opal with increased appreciation for natural environments. Some believe the stone strengthens emotional awareness while helping people feel calmer and more centered outdoors. Forests, gardens, mountains, rivers, and open landscapes often create feelings of emotional clarity because they slow mental overstimulation and reconnect people with physical presence. Green opal symbolically mirrors this grounding effect.
Its connection with nature also carries deeper spiritual implications related to emotional acceptance. In nature, growth and decay exist together as part of the same cycle. Spiritually, green opal reflects the understanding that emotional healing includes both painful and peaceful phases. Difficult emotions do not necessarily represent failure or weakness. Instead, they may form part of a larger process of emotional transformation and renewal.
6 Healing Properties of Green Opal
1. Emotional Healing
Green opal is widely associated with emotional healing because its symbolism centers on emotional release, recovery, and emotional balance. Within crystal healing traditions, many people turn toward this stone during periods of grief, heartbreak, anxiety, trauma recovery, or prolonged emotional stress. Its soft green appearance reinforces its reputation as a calming emotional stone connected with healing rather than emotional intensity.
One reason green opal is strongly linked with emotional healing is its association with suppressed emotions. People often carry unresolved sadness, anger, guilt, disappointment, or emotional pain for years without fully processing those feelings. Over time, these emotional burdens may contribute to emotional exhaustion, emotional numbness, or chronic stress. Spiritually, green opal is believed to help create a safer emotional space where difficult feelings can surface gradually without becoming emotionally overwhelming.
Many practitioners describe green opal as emotionally supportive rather than emotionally forceful. Some healing traditions involve intense emotional confrontation or dramatic cathartic experiences. Green opal symbolizes a gentler approach. It encourages emotional acknowledgment without emotional chaos, which is why many individuals feel drawn to it during vulnerable stages of emotional recovery.
This healing symbolism also reflects emotional acceptance. Many people try to suppress emotional pain because they fear appearing weak or emotionally unstable. Green opal spiritually represents the idea that healing begins when emotions are recognized honestly rather than hidden or denied. Its energy is commonly associated with emotional softness, patience, and self-awareness during recovery.
Because emotional wounds often affect physical energy, relationships, motivation, and mental clarity, emotional healing with green opal is rarely viewed as isolated from the rest of life. Instead, many people see the stone as symbolizing emotional restoration that slowly influences broader personal well-being and emotional stability.
2. Stress Reduction
Green opal has earned a reputation as a calming stone largely because many people associate its energy with emotional cooling and mental relaxation. Its gentle green appearance naturally evokes feelings linked to nature, stillness, and balance, which contributes to its symbolism as a stress-relieving crystal within spiritual traditions.
Stress often creates both mental and emotional overload. People may experience racing thoughts, emotional irritability, difficulty concentrating, fatigue, or emotional tension that slowly accumulates over time. Many crystal practitioners believe green opal helps reduce this internal pressure by encouraging emotional steadiness and mental calmness rather than overstimulation.
Unlike crystals associated with motivation, heightened energy, or emotional intensity, green opal symbolizes slowing down emotionally. This distinction matters because chronic stress frequently keeps people trapped in constant mental activity. Even during rest, the mind may continue replaying worries, responsibilities, fears, or unresolved conflicts. Green opal’s symbolism focuses on creating emotional quiet within that mental noise.
For this reason, many individuals place green opal in meditation spaces, bedrooms, workspaces, or quiet reflection areas. Spiritually, it is often connected with mindfulness, deep breathing, journaling, and emotional grounding practices that encourage emotional regulation during demanding periods.
Its association with stress reduction also reflects emotional balance rather than emotional avoidance. Green opal does not traditionally symbolize escaping responsibilities or suppressing difficult emotions. Instead, it represents approaching emotional challenges from a calmer and more centered state of mind. This calmer emotional foundation may help people think more clearly, communicate more patiently, and recover more effectively from periods of emotional strain.
3. Improved Self-Worth
Green opal is frequently associated with self-worth because many emotional struggles eventually affect how people see themselves. After rejection, criticism, emotional trauma, heartbreak, or repeated disappointment, individuals often begin developing harsh internal dialogue. Feelings of shame, insecurity, emotional inadequacy, or self-doubt may slowly become deeply rooted beneath the surface.
Within crystal healing traditions, green opal symbolizes emotional gentleness toward oneself during these difficult periods. Rather than focusing on achievement, dominance, or external success, its spiritual meaning centers on emotional acceptance and self-compassion. Many practitioners believe this softer emotional energy helps people reconnect with their value without relying entirely on outside validation.
This symbolism becomes important because low self-worth often affects emotional behavior in subtle ways. People may tolerate unhealthy relationships, avoid vulnerability, fear rejection excessively, or become emotionally defensive because they no longer feel emotionally secure internally. Green opal spiritually represents rebuilding emotional confidence through patience and emotional healing rather than through force or denial.
Many healers also connect green opal with emotional authenticity. People struggling with self-worth sometimes hide their true emotions, needs, or personalities to avoid criticism or rejection. Green opal symbolizes emotional openness and emotional honesty, encouraging people to reconnect with themselves more fully instead of constantly seeking approval from others.
Its calming energy also reflects the idea that healing self-worth requires emotional safety. People rarely rebuild confidence while living in constant emotional pressure or self-judgment. Green opal’s symbolism encourages emotional softness during personal healing, allowing confidence to return gradually through emotional stability, self-awareness, and self-acceptance.
4. Relationship Healing
Green opal frequently appears in spiritual practices connected with love, forgiveness, reconciliation, and emotional communication because of its strong connection with heart-centered energy. Relationships often carry emotional wounds, misunderstandings, unspoken resentment, or unresolved emotional tension that slowly weakens emotional closeness over time. Within crystal traditions, green opal symbolizes emotional healing that supports healthier emotional connection between people.
Many practitioners believe the stone encourages emotional honesty while reducing emotional defensiveness. This balance is important because emotional conflict often escalates when people feel attacked, misunderstood, or emotionally unsafe. Green opal spiritually represents calmer emotional communication where vulnerability becomes easier and emotional reactions feel less overwhelming.
Its symbolism is not limited to romantic relationships. Family relationships, friendships, and even a person’s relationship with themselves may benefit from the emotional themes associated with green opal. Compassion, patience, empathy, and forgiveness form major parts of its spiritual identity, which explains why it is often connected with emotional rebuilding after conflict or emotional distance.
Relationship healing also involves emotional accountability. Many people associate green opal with emotional reflection because healthy relationships require individuals to examine their own emotional patterns, fears, and communication habits. Spiritually, the stone symbolizes emotional awareness that develops without harsh self-condemnation.
In reconciliation practices, green opal is often viewed as a reminder that rebuilding trust usually happens slowly. Emotional wounds rarely disappear immediately after apologies or conversations. Instead, healing often develops gradually through consistent emotional honesty, patience, and emotional care. Green opal reflects this slower, steadier approach to emotional repair.
5. Spiritual Grounding
Some spiritual stones are associated with intense emotional experiences, heightened intuition, or powerful energetic stimulation. Green opal tends to symbolize something quieter and more stabilizing. Many practitioners describe it as a grounding stone because its energy feels emotionally steady, calming, and rooted rather than overwhelming or emotionally chaotic.
Spiritual grounding generally refers to maintaining emotional balance and mental clarity while engaging in spiritual reflection or emotional healing. Without grounding, people may feel emotionally scattered, mentally overstimulated, or disconnected from daily reality. Green opal symbolically supports emotional stability during these experiences, helping individuals remain emotionally centered while processing deeper feelings or spiritual insights.
Its connection with grounding is closely tied to nature symbolism. Earthy green colors naturally evoke feelings of stability, balance, and rootedness. Many people feel calmer in forests, gardens, or natural landscapes because nature slows mental overstimulation and reconnects attention with the present moment. Green opal spiritually reflects this same calming influence.
Many meditation practitioners use green opal during quiet reflection because they believe it encourages introspection without emotional overwhelm. Rather than amplifying emotional intensity, the stone symbolizes emotional patience and thoughtful self-awareness. This softer grounding energy can feel especially meaningful during periods of emotional uncertainty or personal transformation.
Spiritual grounding also involves accepting emotional reality honestly instead of escaping from it. Green opal’s symbolism encourages emotional presence rather than emotional avoidance. In many healing traditions, true spiritual growth requires emotional honesty, patience, and balance rather than constant emotional highs or dramatic spiritual experiences.
6. Encouraging Positive Transformation
Green opal symbolizes positive transformation that unfolds naturally over time rather than through sudden emotional upheaval. Many people are drawn to the stone during major life transitions such as career changes, relationship endings, grief recovery, emotional healing journeys, or periods of personal reinvention. Spiritually, it represents growth that develops quietly beneath the surface before becoming fully visible externally.
Transformation often sounds dramatic in spiritual discussions, but real personal change usually develops slowly. A person may gradually become more emotionally open, more self-aware, less reactive, or more emotionally resilient over months or years. Green opal reflects this quieter form of evolution. Its symbolism focuses on emotional progress that feels steady, sustainable, and emotionally grounded.
This meaning becomes especially comforting during uncertain periods. Major life changes frequently create fear, instability, or emotional confusion because people naturally resist the unknown. Green opal spiritually symbolizes trust in gradual growth. Many practitioners believe it encourages emotional patience while helping people adapt to new phases of life with greater emotional balance.
Its strong connection with nature reinforces this symbolism. Growth in nature rarely happens instantly or perfectly. Seeds develop beneath the soil long before visible change appears above the surface. Green opal spiritually mirrors this process by reminding people that emotional transformation often begins internally before outward results become obvious.
Many healing traditions also associate green opal with releasing outdated emotional patterns that no longer support personal growth. Fear, emotional defensiveness, resentment, or self-doubt may once have served as emotional protection but eventually begin limiting emotional well-being. Green opal symbolizes the gradual process of letting go of those emotional burdens while creating space for healthier emotional patterns to emerge naturally over time.
How to Wear Green Opal Jewelry for Spiritual Growth
People wear green opal jewelry in different ways depending on their spiritual intentions and emotional goals. Because the stone strongly connects with the heart chakra, pendants and necklaces remain especially popular. Wearing green opal close to the chest symbolically aligns the stone with emotional healing, compassion, and emotional openness.
Green opal rings also carry significance in spiritual practices. Some believe wearing the stone on the hands strengthens mindful communication and emotional awareness throughout daily interactions. Others prefer bracelets because they allow regular physical contact with the stone during stressful moments.
Many people wear green opal during meditation, yoga, prayer, journaling, or emotionally important conversations. In crystal traditions, consistent contact with the stone supposedly strengthens emotional awareness over time.
Some practitioners combine green opal with complementary crystals such as rose quartz, moonstone, amethyst, or green aventurine to create balanced emotional energy. Rose quartz may amplify themes of compassion and love, while amethyst may support calm introspection and spiritual clarity.
Spiritual use varies widely between individuals. Some people feel strong emotional resonance with green opal immediately, while others simply appreciate its calming beauty without attaching deeper metaphysical meaning.
Caring for Green Opal Jewelry
Green opal requires gentle care because of its relatively soft structure and water content. Unlike harder gemstones, opal can crack, dry out, or lose polish when exposed to harsh conditions for long periods.
Store green opal jewelry separately from harder stones to avoid scratches. Soft fabric pouches or padded jewelry boxes work best. Avoid prolonged exposure to direct sunlight, extreme heat, sudden temperature changes, or very dry environments because these conditions may weaken the stone over time.
Clean green opal carefully using lukewarm water, mild soap, and a soft cloth. Avoid ultrasonic cleaners, steam cleaning machines, harsh chemicals, or abrasive brushes. These methods may damage the surface or internal structure.
If you wear green opal jewelry frequently, remove it before intense physical activity, swimming, or household cleaning. Gentle treatment helps preserve both its appearance and structural stability for many years.
Many people who value green opal spiritually also cleanse it energetically. Common methods include moonlight exposure, meditation, sound cleansing, or placing the stone near herbs such as sage or lavender. Spiritual cleansing practices vary widely depending on personal belief systems.
Table: Summary
| Aspect | Details |
|---|---|
| Primary Meaning | Emotional healing and renewal |
| Chakra Association | Heart chakra |
| Main Spiritual Symbolism | Compassion, peace, emotional balance |
| Common Colors | Mint green, olive green, moss green |
| Hardness | 5.5 to 6 Mohs |
| Main Sources | Peru, Australia, Madagascar, Ethiopia |
| Emotional Associations | Calmness, forgiveness, self-worth |
| Popular Jewelry Types | Pendants, rings, bracelets |
| Spiritual Uses | Meditation, heart healing, grounding |
| Care Needs | Gentle cleaning and protection from heat |
A Final Note
Green opal stands apart from many gemstones because its symbolism feels deeply emotional rather than dramatic. People often gravitate toward it during moments when they need calm instead of intensity, healing instead of distraction, and emotional honesty instead of emotional armor.
Its spiritual meaning centers on renewal, compassion, emotional balance, and heart-centered awareness. Whether viewed through a metaphysical lens or appreciated simply for its natural beauty, green opal continues to resonate with people seeking emotional clarity and inner peace.
If green opal draws your attention, that connection may reflect something personal within your current emotional journey. Some people wear it for spiritual support, others keep it as a reminder of healing and growth, and many simply appreciate the quiet comfort it seems to represent.
References
- https://coralstrands.com/blogs/candy-gram/green-opal-meaning-healing-properties
- https://sfncrystals.com/green-opal/
- https://www.exoticdiamondsa.com/blogs/blogs/opal-stone-spiritual-meaning-healing-properties-how-to-use-it-9
- https://www.exoticdiamondsa.com/blogs/blogs/opal-stone-spiritual-meaning-healing-properties-how-to-use-it-9
- https://thecrystalcouncil.com/crystals/green-opal
- https://geofossiles.com/galet-opale-vertegalet-opale-vertePROP654565product_id=9407
- https://opaldiamondfactory.com.au/opal/culture/symbolism/
- https://www.youtube.com/watch?v=y-7SDPXBrzQ
- https://www.crystalcave.nl/en/edelsteen-encyclopedie/groene-opaal/
- https://capecodcrystals.com/pages/green-opal