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Black Opal
Black Opal
☒

Muscovite
Muscovite
☒



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Black Opal
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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
1.97-2.22
Conchoidal
None
6-6.5
SiO 2 + H 2OUlrich Henn and Claudio C.
 
Elastic
-
-
2.78-2.88
-
Perfect on the {001}
2-3
KAl 2AlSi 3O 10(OH) 2Walter Schumann , Gemstones of the world (2001) More from other references

Compare Blue Gemstones

Blue Gemstones

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Ceylonite
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Chrome-Chalcedony
Muscovite
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Muscovite
Blue John
Muscovite Vs Blue John
Muscovite
Boleite
Muscovite Vs Boleite

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