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Gypsum and Rock Crystal Optical Properties


Rock Crystal and Gypsum Optical Properties


Optical Properties

Luster
Vitreous, Silky, Pearly, Waxy   
Not Available   

Pleochroism
None   
AbsentWalter Schumann   

Dispersion
Not Available   
0.01   
27

Transparency
Transparent, Translucent   
TransparentWalter Schumann, Gemstones of the world (2001) More from other references   

Refractive Index
1.521-1.531   
1.544-1.553   

Optic Character
Not Available   
Not Available   

Crystal System
monoclinic   
Not Available   

Birefringence
0.010   
0.009   

Clarity
Transparent   
TransparentWalter Schumann   

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Gypsum and Rock Crystal Optic Character

Gypsum and Rock Crystal optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Gypsum and Rock Crystal Physical Properties like crystallographic symmetry, pleochroism,etc. in the crystal. Some of the optical properties are refractive index, luster, optic character, pleochroism etc. Prominent among these is Gypsum and Rock Crystal optic character. You might have noticed your gemologist rotating the gemstone while testing it. Rotating a gemstone along its optic axis helps in determining its optic character.

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Gypsum and Rock Crystal Transparency

Similar to their colors, Gypsum and Rock Crystal transparency can also be used as criteria for their primary identification. Although transparency cannot be the only criteria for gemstone identification, it can efficiently used in gemstone grading. Talking about their transparency, Gypsum is Translucent and Transparent while Gypsum is Translucent and Transparent in appearance.

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