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Proustite and Sapphirine Optical Properties


Sapphirine and Proustite Optical Properties


Optical Properties

Luster
Adamantine   
Not Available   

Pleochroism
Moderate; cochineal-red to blood-red   
Not Available   

Dispersion
Not Available   
0.02   
20

Transparency
OpaqueUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) Rarely transparentMore from other references   
Transparent   

Refractive Index
2.792-3.087   
1.701-1.724   

Optic Character
Not Available   
Not Available   

Crystal System
Trigonal   
Not Available   

Birefringence
0.295-0.296   
0.005-0.007   

Clarity
OpaqueUlrich Henn and Claudio C. Milisenda   
Transparent   

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Proustite and Sapphirine Optic Character

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

Similar to their colors, Proustite and Sapphirine 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, Proustite is Gemmological Tables (2004) Rarely transparentMore from other references and OpaqueUlrich Henn and Claudio C. Milisenda while Proustite is Gemmological Tables (2004) Rarely transparentMore from other references and OpaqueUlrich Henn and Claudio C. Milisenda in appearance.

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