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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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Claro Opal

A variety of 'Precious Opal' [Opal]
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Formula:
SiO2 · nH2O
Transparent mexican Precious Opal with an intense play of colours (red, green, blue and yellow).


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Unique IdentifiersHide

Mindat ID:
8005 (as Claro Opal)
3004 (as Opal)
Long-form identifier:
mindat:1:1:8005:3 (as Claro Opal)
mindat:1:1:3004:1 (as Opal)

Chemistry of Claro OpalHide

Mindat Formula:
SiO2 · nH2O
Element Weights:
Element% weight
O61.458 %
Si35.961 %
H2.581 %

Calculated from ideal end-member formula.
Elements listed:
H, O, Si - search for minerals with similar chemistry

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 Claro OpalHide

References for Claro OpalHide

Reference List:
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