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Smoky Quartz Mineral Specimens of Ultra-..
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Light blue Hemimorphite Quartz Mineral S..
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Feldspar Orthoclase Microcline Albite,Fl..
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Orthoclase Microcline Feldspar,Fluorite ..
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Purple blue Eight face body fluorite bri..
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Quartz and asbestos metasomatic pseudomo..
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Iddingsite
Name
 Iddingsite
Chemical
Formula
 MgFe2Si3O10·4H2O
Species
 Silicates
Crystal
System
 Orthorhombic
Mohs
Scale
 3
Refractive
Index
 n = 1.670 - 1.730 n = 1.700 - 1.760 n = 1.720 - 1.770
Specific
Gravity
 2.12-2.15
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