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Gypsum
Gypsum
☒

Mottramite
Mottramite
☒



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Gypsum
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Mottramite
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Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
Vitreous, Silky, Pearly, Waxy
None
0.01
Transparent, Translucent
1.521-1.531
-
monoclinic
0.010
Transparent
 
Greasy
Visible X=Y= canary yellow to greenish yellow
0.04
-
2.170
-
Orthorhombic
0.150
-

Compare Colorless Gems

Colorless Gems

Orthoclase
Orthoclase
Pectolite
Pectolite
Phenakite
Phenakite
Mottramite
Herderite
Mottramite Vs Herderite
Mottramite
Hibschite
Mottramite Vs Hibschite
Mottramite
Hyalite
Mottramite Vs Hyalite

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