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Plumbogummite
Plumbogummite

Kornerupine
Kornerupine



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X
Plumbogummite
X
Kornerupine
Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
Resinous
None
0.04
-
1.653-1.688
-
Trigonal
-9999
-
 
Vitreous
X = colorless to green; Y = colorless
0.02
-
1.660-1.685
-
Orthorhombic
0.012-0.017
TransparentUlrich Henn and Claudio C. Milisenda