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You Are Here :
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Natural heritage
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Adrian Smith Mineral Collection
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Minerals, gems and meteorites
/
445-461 Gemstones
/
Crystaline
449. Topaz. Crystaline
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Dana number
52.3.1.1
Chemical formula
Al
2
SiO
4
(F,OH)
2
Crystal class
Orthorhombic
Mohs hardness
8
Specific gravity
3.4-3.6
Collected in
Minas Gerais Province, Brazil
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