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Glass
Glass
☒

Rock Crystal
Rock Crystal
☒



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Glass
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Rock Crystal
Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
2.39-4.00
-
None
4-6
SiO2
 
-
-
-
2.65
ConchoidalWalter Schumann
None
7
SiO 2Walter Schumann , Gemstones of the world (2001)