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Forsterite
Forsterite

Gypsum
Gypsum



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Forsterite
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Gypsum

Forsterite and Gypsum Optical Properties

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Optical Properties

Luster

Vitreous
Vitreous, Silky, Pearly, Waxy

Pleochroism

colorless.
None

Dispersion

0.020.01
0.005 1
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Transparency

Transparent
Transparent, Translucent

Refractive Index

1.635-1.6711.521-1.531
1 3.25
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Optic Character

-
-

Crystal System

Orthorhombic
monoclinic

Birefringence

0.033-0.0420.010
0 0.296
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Clarity

Transparent
Transparent

Forsterite and Gypsum Optic Character

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

Forsterite and Gypsum Transparency

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