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Moss Opal

PRODUCT TYPE: Rocks & Minerals

Size Range: 1"-2.5"

The pictures are an average representation of what you may receive. Larger specimens will be prioritized first. 



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Moss Opal

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further research

Moss opal is a type of opal easily identified by its dark, streaky, moss-like inclusions. Another name for it is “dendritic opal”, dendrite meaning “tree” for their branching habit. These streaking marks are a class of minerals called hornblende. This opal specimen was mined from an Australian deposit where 95% of the world’s white opal supply is mined.


• The opal in these rocks can range from milky white to brown and even bright orange.

• Dendritic crystallization forms a natural fractal pattern. A 2-dimensional example of this is frost formation on a window.


• You can add this opal variety to your geology collection.

• Dendritic growth is an important area of ongoing research in material science. NASA has tested forming special materials in the microgravity of low Earth orbit using dendritic growth in metals.


Customer Reviews

Based on 4 reviews
D.R. (Virginia, United States)

It's fine, Etsy won't let me get rid of the notification until I review this item...arrived as expected.

A.L. (Virginia, United States)

Alexis rated this 5 stars on Etsy

S.T. (California, United States)
Favorite shop does it again!

Moss opal shipped lightning speed and knocked my jaw out upon arrival;) I really appreciate what this shop does and the quality of product I receive in every order. Including this one!

H.E. (Virginia, United States)

Hannah rated this 4 stars on Etsy

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Moss Opal

Moss Opal