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Hackmanite
Hackmanite

Antigorite
Antigorite



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Hackmanite
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Antigorite

Hackmanite and Antigorite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous
Waxy, Silky, Resinous, Greasy
1.2 Pleochroism
Not Available
pale greenish yellow.
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Gemmological Tables (2004)
Translucent
1.5 Refractive Index
1.483-1.4871.530-1.575
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Not Available
Monoclinic Domatic H-M Symbol (m) Space Group: Cm
1.8 Birefringence
Not AvailableNot Available
Achroite
0 0.296
1.9 Clarity
Transparent
Translucent

Hackmanite and Antigorite Optic Character

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

Hackmanite and Antigorite Transparency

Similar to their colors, Hackmanite 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, Hackmanite is Gemmological Tables (2004) while Hackmanite is Gemmological Tables (2004) in appearance.