Moss Opal / Dendritic Opal

Gem-lovers may come across the term “dendritic” in a few gemstone varieties. One such gemstone is dendritic opal, a type of opal with a milky, opalescent sheen and dark inclusions that form stunning fern-like patterns across the stone’s surface.  These inclusion patterns have also led to the alternate names “moss opal” or “mossy opal.” 

What is a dendritic gemstone?

Biologists know dendrites as the branching ends of nerve cells that communicate with other dendrites along synapses to pass messages through the body. Gemologists use the word “dendrites” to refer to tree-like markings on a gemstone or rock. When an opal or any gemstone displays tree-like inclusion patterns, gemologists call it a “dendritic” variety of that stone.

In the spiritual community, dendritic opals hold potent magical properties, often used for healing physical, emotional, and spiritual ailments.

How is dendritic opal formed?

Dendritic opal formation occurs as it does with other opals. Groundwater picks up silica spheres and settles into pockets underground, gradually hardening into opal. The water-mineral solution that eventually forms dendritic opal also has manganese and/or iron minerals that form the stone’s inclusions as it hardens.

Dendritic opal inclusions can form various patterns, and every pattern is unique. For instance, dendritic opals with inclusions resembling woodland landscapes have been dubbed “landscape opal.” 

Dendritic Opal vs. Dendritic Agate

Dendritic agate and dendritic opal are both types of silicates with dark, tree-like inclusions, but the stones differ in a few key ways:

  • Mineral Family: Dendritic agate is a banded chalcedony variety, while dendritic opal is an opal variety.

  • Crystal Structure: Dendritic agate has a hexagonal crystal structure, but dendritic opal is amorphous (without a crystal structure).

  • Mineral Status: Agate is a mineral, while dendritic opal is a mineraloid.  For reference, mineraloids are mineral-like but don’t have crystalline structures and show a wider range of chemical compositions than minerals do.

  • Hardness: Dendritic agate ranks at 7 on the Mohs mineral hardness scale, while dendritic opal ranks at 5.5 to 6, like most opals.

  • Locations: Most dendritic agate comes from Brazil, India, and Mexico. Dendritic opal mostly comes from Australia, Mexico, and the USA. 

Interestingly, dendritic opalite sometimes gets its inclusions from the presence of dendritic agate during its formation.

Dendritic Opal History & Sources

The term “dendrite” comes from the Ancient Greek dendritēs, meaning “tree-like,” derived from dendron, meaning “tree.” The word “opal” comes from either the Latin opallus, meaning “precious stone,” or the Ancient Greek opallios, meaning “to see a change in color.” 

The first official discovery of dendritic opal was in the 19th-century, when German geologist Johannes Menge discovered the first common opals in Australia circa 1849.

As miners uncovered vast Australian opal deposits, the stone’s reputation worldwide flourished. Royals and average citizens alike adorned themselves in the stone, leading to Australia’s current ranking as the world’s top opal producer.

Nowadays, where is dendritic opal found? And is dendritic opal rare?

Dendritic opal is a fairly abundant gemstone with mines all over the world, though most of these stones still come from Australia. Other prominent locales include Mexico and the USA, where miners in Virgin Valley, Nevada, produce some fluorescent dendritic opals that glow in vibrant green hues.

You can also find dendritic opal deposits in:

Austria Honduras Russia

 Over time, gemstones often change names or collect new nicknames. In dendritic opal’s case, you’ll often see it tied to the name “merlinite.” 

Dendritic Opal Meaning & Symbolism

If you were born in October, dendritic opal is an earthy variety of your traditional birthstone, the opal. Astrologically, the dendritic opal is a planetary stone for the sun, making it a lucky talisman for the zodiac sign Leo.

Historically, the dendritic opal spiritual meaning tied to magic and power. In the Middle Ages, people thought these stones held mystical energies, allowing whoever held one to see their truest self. Nobles would carry them as a status symbol, also believing the stone could help them stay in power.

Those who study or practice witchcraft believed dendritic opals could enhance their spells or powers, commonly keeping the opal with them or using it in rituals.

In modern spiritual circles, dendritic opals’ dark patterns, contrasting against their white surfaces, symbolize the balance of opposites — similar to yin and yang. Additionally, the patterns’ resemblance to nature represents one’s connection to Earth, boosting intuition and self-awareness.

Dendritic Opal Healing Properties

With a nickname linked to one of history’s most legendary wizards, dendritic opal, or “merlinite,” is bound to carry some truly magical healing powers. 

On the physical side, dendritic opal supports the circulatory system and immune system. Many crystal healers also use it to cure dizziness, inflammation, and kidney issues. 

Emotionally, dendritic opal is commonly used for personal growth and stress reduction. The stone purportedly aids emotional health by shielding you from toxic forces or people, as well as instilling you with more empathy and patience. 

Spiritual healing is arguably the most popular of dendritic opal uses. The stone is said to increase spiritual awareness, bringing greater intuition and understanding of the universal forces at work. 

Often called a Shaman stone, dendritic opal is great for anyone exploring past lives, clairvoyance, or divine beings. When used in deep meditation, dendritic opal may allow a clearer vision of your past lives, giving you insight into your current spiritual path and purpose. 

Dendritic Opal Chakra

Dendritic opal corresponds to the crown chakra. This chakra, located in a swirling halo of energy right above the head, is the seventh and highest chakra. It governs your connection and communication with the spiritual side of the universe, as well as abstract thought. 

Since the crown chakra governs the nervous system, where our biological dendrites are, it seems only fitting that the stone would balance it!

When the crown chakra is blocked, you may feel disillusioned, ungrounded, or resistant to new ideas. You can use dendritic opal to open the chakra again, awakening your consciousness to accept the wisdom of the universe.

Branch Out With Dendritic Opal!

In the expansive world of opals, dendritic opal is an earthy variety that’s ideal for anyone seeking a gem as unique as they are.  Dendritic opals can instantly elevate any room or outfit. 

Whether you’re accessorizing for a mystical aesthetic, could use some spiritual growth, or want to carry a soothing piece of nature with you, dendritic opal is the perfect gem for the job! 


Moss Opal is said to increase the achievement of personal goals, the acquisition of prosperity, the healing of the wounds of past lives, the ability to communicate with natures spirits and the grounding of spiritual energies within the physical body.
Shop the Winter Pine collection featuring breathtaking winter landscapes, majestic evergreens, and sunning moss/dendritic opals and moss agate.

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