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Benitoite
Benitoite

Antigorite
Antigorite



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Benitoite
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Antigorite

Benitoite and Antigorite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous
Waxy, Silky, Resinous, Greasy
1.2 Pleochroism
O = colorless; E = purple
pale greenish yellow.
1.3 Dispersion
0.04NA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Transparent
Translucent
1.5 Refractive Index
1.757-1.8041.530-1.575
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Hexagonal
Monoclinic Domatic H-M Symbol (m) Space Group: Cm
1.8 Birefringence
0.047Not Available
Achroite
0 0.296
1.9 Clarity
Transparent
Translucent

Benitoite and Antigorite Optic Character

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

Benitoite and Antigorite Transparency

Similar to their colors, Benitoite and Antigorite 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, Benitoite is Transparent while Benitoite is Transparent in appearance.