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Malachite and Grossular Optical Properties


Grossular and Malachite Optical Properties


Optical Properties

Luster
Adamantine, Vitreous, Silky, Fibrous   
Greasy, Vitreous   

Pleochroism
Not Available   
None   

Dispersion
None   
0.02   
18

Transparency
Opaque   
Gemmological Tables (2004) More from other references   

Refractive Index
1.655-1.909   
1.730-1.760   

Optic Character
Not Available   
Not Available   

Crystal System
monoclinic   
cubic   

Birefringence
0.254   
0.020   

Clarity
Gemmological Tables (2004) More from other references   
TransparentUlrich Henn and Claudio C. Milisenda   

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Malachite and Grossular Optic Character

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

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

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