Antigorite and Spinel Optical Properties

Antigorite

Spinel

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Optical Properties

Luster

Waxy, Silky, Resinous, Greasy

Vitreous

Pleochroism

pale greenish yellow

Absent

Dispersion

0.020.02

0.005 1

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Transparency

Translucent

Transparent, Translucent, Transparent to translucent

Refractive Index

1.530-1.5751.73

1 3.25

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Optic Character

Crystal System

Monoclinic Domatic H-M Symbol (m) Space Group: Cm

Isometric

Birefringence

-9999-9999

0 0.296

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Clarity

Translucent

TransparentUlrich Henn and Claudio C. Milisenda

Antigorite and Spinel Optic Character

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

Similar to their colors, Antigorite and Spinel 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, Antigorite is Translucent while Antigorite is Translucent in appearance.