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Iolite
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Pezzottaite
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Iolite
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Pezzottaite
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Pezzottaite
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Summary
Astrology
Physical Properties
Optical Properties
Benefits
All
Physical Properties
Tenacity
Solubility
Durability
Specific Gravity
Fracture
Cleavage
Mohs Hardness
Chemical Composition
-
-
-
2.6-2.7
-
3,1
7-7.5
Mg
2
Al
4
Si
5
O
18
-
-
-
2.90-3.14
Conchoidal, Uneven
Imperfect; basal
7.5-8
(Be,Cs) 3Al 2Si 6O 18 · 0.5H 2OUlrich Henn and Claudio C.
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