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Anthophyllite and Hematite Optical Properties


Hematite and Anthophyllite Optical Properties


Optical Properties

Luster
Vitreous, Pearly  
-  

Pleochroism
-  
O = brownish red; E = yellowish red  

Dispersion
0.01  
99+
0.05  
25

Transparency
Transparent  
OpaqueHerve Nicolas Lazzarelli  

Refractive Index
1.603-1.690  
2.690-3.220  

Optic Character
Biaxial/+  
-  

Crystal System
Orthorhombic Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P nma  
Trigonal  

Birefringence
-9999  
0.280  

Clarity
Transparent  
OpaqueHerve Nicolas Lazzarelli  

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Anthophyllite and Hematite Optic Character

Anthophyllite and Hematite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Anthophyllite 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 Anthophyllite 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. Anthophyllite has Biaxial/+ character.

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Anthophyllite and Hematite Transparency

Similar to their colors, Anthophyllite 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, Anthophyllite is Transparent while Anthophyllite is Transparent in appearance.

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