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Phlogopite
Phlogopite
☒

Spessartine
Spessartine
☒



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Phlogopite
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Spessartine
Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
Pearly
-
0.04
-
1.530-1.573
-
monoclinic
0.0280-0.0450
-
 
Vitreous
-
0.03
-
1.789-1.820
-
Isometric
0.027
TransparentUlrich Henn and Claudio C. Milisenda