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Hematite and Sinhalite Optical Properties


Sinhalite and Hematite Optical Properties


Optical Properties

Luster
Not Available   
Not Available   

Pleochroism
O = brownish red; E = yellowish red   
Trichroism: green light brown dark brownHerve Nicolas Lazzarelli   

Dispersion
Not Available   
0.02   
21

Transparency
OpaqueHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references   
Gemmological Tables (2004) More from other references   

Refractive Index
2.690-3.220   
1.665-1.712   

Optic Character
Not Available   
Not Available   

Crystal System
Trigonal   
Orthorhombic   

Birefringence
0.280   
0.036-0.042   

Clarity
OpaqueHerve Nicolas Lazzarelli   
TransparentUlrich Henn and Claudio C. Milisenda   

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Hematite and Sinhalite Optic Character

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

Similar to their colors, Hematite and Sinhalite 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, Hematite is Blue Chart Gem Identification (2010) More from other references and OpaqueHerve Nicolas Lazzarelli while Hematite is Blue Chart Gem Identification (2010) More from other references and OpaqueHerve Nicolas Lazzarelli in appearance.

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