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Proustite and Nuummite Optical Properties


Nuummite and Proustite Optical Properties


Optical Properties

Luster
Adamantine   
Not Available   

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

Dispersion
Not Available   
Not Available   

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

Refractive Index
2.792-3.087   
1.635-1.663   

Optic Character
Not Available   
Not Available   

Crystal System
Trigonal   
Not Available   

Birefringence
0.295-0.296   
0.0170-0.230   

Clarity
OpaqueUlrich Henn and Claudio C. Milisenda   
Gemmological Tables (2004) More from other references   

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Proustite and Nuummite Optic Character

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

Similar to their colors, Proustite and Nuummite 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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