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Hyacinth
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Amethyst
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Gemstones
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Hyacinth
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Amethyst
Hyacinth
Amethyst
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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
-
-
-
3.93-4.73
Conchoidal
Indiscernible
6.5-7.5
ZrSiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)
-
insoluble in common solvents
-
2.65
Conchoidal, ConchoidalWalter Schumann
Indiscernible
7
SiO
2
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