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Falcons Eye
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Blue John
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Falcons Eye
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Blue John
Falcons Eye
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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
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2.58-2.64
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7
SiO 2Walter Schumann , Gemstones of the world (2001)
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3.00-3.25
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Perfect
-9999
CaF 2Michael OâDonoghue , Gems, Sixth Edition (2006)
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