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Emerald
Iolite
Iolite and Emerald Physical Properties
Summary
Astrology
Physical Properties
Optical Properties
Benefits
All
Physical Properties
Tenacity
-
-
Solubility
-
-
Durability
Hard
-
Specific Gravity
2.67-2.78
2.6-2.7
Fracture
Uneven, ConchoidalWalter Schumann
-
Cleavage
Imperfect on the [0001]
3,1
Mohs Hardness
7.5-8
7-7.5
Chemical Composition
Be
3
Al
2
SiO
6
Mg
2
Al
4
Si
5
O
18
Optical Properties >>
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