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Gypsum
Gypsum

Forsterite
Forsterite



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Gypsum
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Forsterite

Gypsum and Forsterite Optical Properties

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Optical Properties

Luster

Vitreous, Silky, Pearly, Waxy
Vitreous

Pleochroism

None
colorless.

Dispersion

0.010.02
0.005 1
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Transparency

Transparent, Translucent
Transparent

Refractive Index

1.521-1.5311.635-1.671
1 3.25
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Optic Character

-
-

Crystal System

monoclinic
Orthorhombic

Birefringence

0.0100.033-0.042
0 0.296
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Clarity

Transparent
Transparent

Gypsum and Forsterite Optic Character

Gypsum and Forsterite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Gypsum and Forsterite 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 Forsterite 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.

Gypsum and Forsterite Transparency

Similar to their colors, Gypsum and Forsterite 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 Transparent and Translucent while Gypsum is Transparent and Translucent in appearance.