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Mottramite
Mottramite
☒

Titanite Sphene
Titanite Sphene
☒



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X
Mottramite
X
Titanite Sphene
Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
Greasy
Visible X=Y= canary yellow to greenish yellow
0.04
-
2.170
-
Orthorhombic
0.150
-
 
-
Green stones strong trichroism: typically colorless greenish yellow brownish to yellow;
0.05
Transparent, Translucent
1.843-2.110
-
-
0.100-0.192
Transparent