Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Mountain Opal

A variety of Opal
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Unnecessary name for Opal from an igneous origin.


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Unique IdentifiersHide

Mindat ID:
9802 (as Mountain Opal)
3004 (as Opal)
Long-form identifier:
mindat:1:1:9802:7 (as Mountain Opal)
mindat:1:1:3004:1 (as Opal)

Synonyms of Mountain OpalHide

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for Mountain OpalHide

References for Mountain OpalHide

Reference List:
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