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Thulite
Thulite
☒

Fluorapatite
Fluorapatite
☒



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Thulite
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Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
Vitreous
Present
0.02
Opaque, Translucent, Opaque . May be translucent in thin backlit sections.
1.695
-
Orthorhombic
0.006-0.018
OpaqueHerve Nicolas Lazzarelli
 
Vitreous, Resinous
Weak to strong if coloreD
0.03
Transparent
1.631-1.650
-
Hexagonal
-9999
Transparent

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Willemite
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