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Grossular
Grossular

Anthophyllite
Anthophyllite



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Grossular
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Anthophyllite

Grossular and Anthophyllite Optical Properties

Optical Properties

Luster

Greasy, Vitreous
Vitreous, Pearly

Pleochroism

None
-

Dispersion

0.020.01
0.005 1
👆🏻

Transparency

-
Transparent

Refractive Index

1.730-1.7601.603-1.690
1 3.25
👆🏻

Optic Character

-
Biaxial/+

Crystal System

cubic
Orthorhombic Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P nma

Birefringence

0.020-9999
0 0.296
👆🏻

Clarity

TransparentUlrich Henn and Claudio C. Milisenda
Transparent

Grossular and Anthophyllite Optic Character

Grossular and Anthophyllite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Grossular and Anthophyllite 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 Anthophyllite 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. Anthophyllite has Biaxial/+ character.

Grossular and Anthophyllite Transparency

Similar to their colors, Grossular and Anthophyllite 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.