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Phenakite
Phenakite

Antigorite
Antigorite



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Phenakite
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Antigorite

Phenakite and Antigorite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous
Waxy, Silky, Resinous, Greasy
1.2 Pleochroism
Distinct: colorless orangy-yellowHerve Nicolas Lazzarelli
pale greenish yellow.
1.3 Dispersion
0.02NA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Gemmological Tables (2004) More from other references
Translucent
1.5 Refractive Index
1.650-1.6951.530-1.575
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Trigonal
Monoclinic Domatic H-M Symbol (m) Space Group: Cm
1.8 Birefringence
0.016Not Available
Achroite
0 0.296
1.9 Clarity
TransparentUlrich Henn and Claudio C. Milisenda
Translucent

Phenakite and Antigorite Optic Character

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

Phenakite and Antigorite Transparency

Similar to their colors, Phenakite 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, Phenakite is Gemmological Tables (2004) More from other references while Phenakite is Gemmological Tables (2004) More from other references in appearance.