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Opal Var Black Opal

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CLB93734

Opal Var Black Opal

Classic Locality

Description Tabs

Description
Locality: 
El Mochito Mine, Santa Barbara Department, Honduras
Size Range: 
Cabinet (10-18 cm)
Size: 
10.8 × 7 × 4 cm
Description

Tis black opal has has a dark gray rough matrix (like tuff) with white pieces in it. Looks like 50% of the specimen is opal, one part polished. Black opal is the most precious opal. The specimen weights 221 gram, about 1,100 ct.

Mineral Data
What's on the rock

Opal

Formula: 
SiO2·nH2O
Strunz: 
4.DA.10
Hardness: 
5.5 - 6.5
Streak: 
White

Black Opal

Variety Of: 

Precious Opal

Formula: 
SiO2·nH2O
Hardness: 
5.5 - 6.5
Hardness: 
0.0

Seller Information

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