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Anhydrite
Anhydrite

Danburite
Danburite



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Anhydrite
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Danburite

Anhydrite and Danburite Optical Properties

1 Optical Properties
1.1 Luster
Pearly, Greasy
Vitreous, Greasy
1.2 Pleochroism
For violet varieties
Weak: pale yellow yellow
1.3 Dispersion
0.010.02
Fluorite Optical Properties
0.007 1
1.4 Transparency
Transparent
Gemmological Tables (2004) More from other references
1.5 Refractive Index
1.570-1.6141.627-1.639
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Biaxial/+
1.7 Crystal System
Orthorhombic
Orthorhombic
1.8 Birefringence
0.042-0.0440.006
Achroite
0 0.296
1.9 Clarity
Transparent
TransparentUlrich Henn and Claudio C. Milisenda

Anhydrite and Danburite Optic Character

Anhydrite and Danburite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Anhydrite and Danburite 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 Danburite 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. Danburite has Biaxial/+ character.

Anhydrite and Danburite Transparency

Similar to their colors, Anhydrite and Danburite 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.