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Antigorite and Hematite Optical Properties


Hematite and Antigorite Optical Properties


Optical Properties

Luster
Waxy, Silky, Resinous, Greasy   
Not Available   

Pleochroism
pale greenish yellow.   
O = brownish red; E = yellowish red   

Dispersion
Not Available   
Not Available   

Transparency
Translucent   
OpaqueHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references   

Refractive Index
1.530-1.575   
2.690-3.220   

Optic Character
Not Available   
Not Available   

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

Birefringence
Not Available   
0.280   

Clarity
Translucent   
OpaqueHerve Nicolas Lazzarelli   

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Antigorite and Hematite Optic Character

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

Similar to their colors, Antigorite and Hematite 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.

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