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Brookite
Alexandrite
Brookite
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Summary
Astrology
Physical Properties
Optical Properties
Benefits
All
1 Optical Properties
1.1 Luster
Vitreous
Adamantine
1.2 Pleochroism
Not Available
Very weak
1.3 Dispersion
NA
NA
Fluorite Optical Properties
▶
⊕
0.007
1
1.8 Transparency
Transparent, Transparent to nearly opaque
Gemmological Tables (2004) More from other references
1.9 Refractive Index
1.739-1.770
2.583-2.741
Agate Opal
▶
⊕
1
3.25
1.11 Optic Character
Biaxial/+
Not Available
1.12 Crystal System
Orthorhombic
Orthorhombic
1.13 Birefringence
0.007-0.010
0.117
Achroite
▶
⊕
0
0.296
1.14 Clarity
Transparent
Gemmological Tables (2004) More from other references
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