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Sapphire
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Turquoise
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Gemstones
Gems for Taurus
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Sapphire
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Turquoise
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Turquoise
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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
-
insoluble
-
3.95-4.03
Uneven
None, but may exhibit parting
9
Al
2
O
3
-
Soluble
-
2.30-2.90
Conchoidal
Good to perfect_usually N/A
5-6
CuAl
6
(PO
4
)
4
(OH)
8
• 4H
2
O
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