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Nuummite
Nuummite

Titanite
Titanite



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X
Nuummite
X
Titanite
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Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
-
-
0.02
-
1.635-1.663
-
-
0.0170-0.230
-
 
Subadamantine, Resinous
Strong: X = nearly colorless; Y = yellow to green; Z = red to yellow-orange
0.05
-
1.885-1.990
-
monoclinic
0.105-0.135
-