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Anhydrite
Anhydrite

Lapis lazuli
Lapis lazuli



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Anhydrite
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Lapis lazuli

Anhydrite and Lapis lazuli Optical Properties

1 Optical Properties
1.1 Luster
Pearly, Greasy
Vitreous, Greasy
1.2 Pleochroism
For violet varieties
AbsentWalter Schumann
1.3 Dispersion
0.01None
Fluorite Optical Properties
0.007 1
1.4 Transparency
Transparent
Opaque
1.5 Refractive Index
1.570-1.6141.500-1.670
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Orthorhombic
Trigonal
1.8 Birefringence
0.042-0.044Not Available
Achroite
0 0.296
1.9 Clarity
Transparent
Gemstones of the world (2001)

Anhydrite and Lapis lazuli Optic Character

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

Anhydrite and Lapis lazuli Transparency

Similar to their colors, Anhydrite and Lapis lazuli 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, Anhydrite is Transparent while Anhydrite is Transparent in appearance.