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Nuummite
Nuummite
☒

Black Opal
Black Opal
☒



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Nuummite
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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
3.18-3.37
Conchoidal
Perfect on 210
5.5-6
Na(Fe,Mg)7(AlSi7O22)(OH)2
 
-
-
-
1.97-2.22
Conchoidal
None
6-6.5
SiO 2 + H 2OUlrich Henn and Claudio C.

Compare Green Gemstones

Green Gemstones

Sapphirine
Sapphirine
Seraphinite
Seraphinite
Smaragdite
Smaragdite
Black Opal
Pargasite
Black Opal Vs Pargasite
Black Opal
Pumpellyite
Black Opal Vs Pumpellyite
Black Opal
Pyromorphite
Black Opal Vs Pyromorphite

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