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Lazurite
Lazurite

Proustite
Proustite



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Lazurite
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Proustite

Lazurite and Proustite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous
Adamantine
1.2 Pleochroism
Not Available
Moderate; cochineal-red to blood-red
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Gemmological Tables (2004) More from other references
OpaqueUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) Rarely transparentMore from other references
1.5 Refractive Index
1.5002.792-3.087
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Isometric
Trigonal
1.8 Birefringence
Not Available0.295-0.296
Achroite
0 0.296
1.9 Clarity
Gemmological Tables (2004) More from other references
OpaqueUlrich Henn and Claudio C. Milisenda

Lazurite and Proustite Optic Character

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

Lazurite and Proustite Transparency

Similar to their colors, Lazurite and Proustite 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, Lazurite is Gemmological Tables (2004) More from other references while Lazurite is Gemmological Tables (2004) More from other references in appearance.