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Calcite
Calcite

Anthophyllite
Anthophyllite



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Calcite
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Anthophyllite

Calcite and Anthophyllite Optical Properties

Optical Properties

Luster

Vitreous, Pearly
Vitreous, Pearly

Pleochroism

-
-

Dispersion

0.150.01
0.005 1
👆🏻

Transparency

Transparent, Translucent
Transparent

Refractive Index

1.486-1.6581.603-1.690
1 3.25
👆🏻

Optic Character

-
Biaxial/+

Crystal System

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

Birefringence

0.154-0.174-9999
0 0.296
👆🏻

Clarity

Transparent
Transparent

Calcite and Anthophyllite Optic Character

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

Calcite and Anthophyllite Transparency

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