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Hurlbutite
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Prase Opal
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Hurlbutite
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Prase Opal
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Prase Opal
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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
-
-
-
2.90
Conchoidal
None
6
CaBe 2(PO 4) 2Michael OâDonoghue , Gems, Sixth Edition (2006)
-
-
-
1.98-2.25
Conchoidal
None
5-6.5
SiO 2 + H 2OUlrich Henn and Claudio C.
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