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Grossular
Grossular

Malachite
Malachite



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Grossular
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Malachite

Grossular and Malachite Optical Properties

Optical Properties

Luster

Greasy, Vitreous
Adamantine, Vitreous, Silky

Pleochroism

None
-

Dispersion

0.020.04
0.005 1
👆🏻

Transparency

-
Opaque

Refractive Index

1.730-1.7601.655-1.909
1 3.25
👆🏻

Optic Character

-
-

Crystal System

cubic
monoclinic

Birefringence

0.0200.254
0 0.296
👆🏻

Clarity

TransparentUlrich Henn and Claudio C. Milisenda
-

Grossular and Malachite Optic Character

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

Grossular and Malachite Transparency

Similar to their colors, Grossular and Malachite 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, Grossular is while Grossular is in appearance.