Antigorite and Erythrite Optical Properties

Antigorite

Erythrite

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1 Optical Properties

1.1 Luster

Waxy, Silky, Resinous, Greasy

Subadamantine, Pearly

1.2 Pleochroism

pale greenish yellow.

Visible: X = pale pinkish to pale rose; Y = pale violet to pale violet-rose; Z = deep red

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Translucent

Not Available

1.5 Refractive Index

1.530-1.5751.626-1.629

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

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

monoclinic

1.8 Birefringence

Not AvailableNot Available

0 0.296

1.9 Clarity

Translucent

Not Available

Antigorite and Erythrite Optic Character

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

Similar to their colors, Antigorite and Erythrite 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.