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Apatite
Apatite

Plumbogummite
Plumbogummite



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Apatite
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Plumbogummite
Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
Vitreous
Blue stones – strong
0.01
-
1.628-1.651
-
Hexagonal
0.002-0.008
TransparentUlrich Henn and Claudio C. Milisenda
 
Resinous
None
0.04
-
1.653-1.688
-
Trigonal
-9999
-