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Yttrium Aluminium Garnet
Yttrium Aluminium Garnet
☒

Common Opal
Common Opal
☒



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Yttrium Aluminium Garnet
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Common Opal
Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
4.55
-
Indiscernible
8-8.5
Y 3Al 5O 12Ulrich Henn and Claudio C.
 
-
-
-
1.98-2.50
Conchoidal
None
5.5-6.5
SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)