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Andalusite
Andalusite
☒

Dallasite
Dallasite
☒



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Andalusite
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Dallasite
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Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
Vitreous, Greasy
strongly trichroic
0.02
Transparent, Translucent
1.627-1.650
-
Orthorhombic
0.009-0.010
Transparent
 
-
-
0.01
-
1.540
-
-
0.008-0.010
-

Compare Brown Gemstones

Brown Gemstones

Aragonite
Aragonite
Astrophyllite
Astrophyllite
Augite
Augite
Dallasite
Anhydrite
Dallasite Vs Anhydrite
Dallasite
Anthophyllite
Dallasite Vs Anthophyllite
Dallasite
Antigorite
Dallasite Vs Antigorite

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