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Dumortierite
☒
Antimony trioxide
☒
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Gemstones
Gems for Taurus
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X
Dumortierite
X
Antimony trioxide
Dumortierite
Antimony trioxide
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Summary
Astrology
Physical Properties
Optical Properties
Benefits
All
Optical Properties
Luster
Pleochroism
Dispersion
Transparency
Refractive Index
Optic Character
Crystal System
Birefringence
Clarity
Vitreous
Strong; X = deep blue or violet; Y = yellow to red-violet or nearly colorless; Z = colorless or very pale blue
0.01
Translucent, Translucent to opaque
1.669-1.723
-
Orthorhombic
0.011-0.037
Translucent
-
-
-
-
2.087
-
cubic (α)<570 °C
-9999
-
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