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Proustite
Proustite

Andradite Garnet
Andradite Garnet



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Proustite
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Andradite Garnet

Proustite and Andradite Garnet Optical Properties

1 Optical Properties
1.1 Luster
Adamantine
Adamantine
1.2 Pleochroism
Moderate; cochineal-red to blood-red
Not Available
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
OpaqueUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) Rarely transparentMore from other references
Transparent, Opaque, Transparent to opaque
1.5 Refractive Index
2.792-3.0871.888-1.889
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Trigonal
Isometric
1.8 Birefringence
0.295-0.296Not Available
Achroite
0 0.296
1.9 Clarity
OpaqueUlrich Henn and Claudio C. Milisenda
Transparent to opaque

Proustite and Andradite Garnet Optic Character

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

Proustite and Andradite Garnet Transparency

Similar to their colors, Proustite and Andradite Garnet 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.