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Natural heritage
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Adrian Smith Mineral Collection
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Minerals, gems and meteorites
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268-402 Silicates
/
Crystaline
398. Lazurite. Crystaline
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Dana number
76.2.3.4
Chemical formula
Na
3
Ca(Al
3
Si
3
O
12
)S
Crystal class
Isometric
Mohs hardness
5-5.5
Specific gravity
2.38-2.45
Collected in
Kokscha Valley, Afghanistan
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