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Anhydrite
Anhydrite

Bastnasite
Bastnasite



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Anhydrite
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Bastnasite

Anhydrite and Bastnasite Optical Properties

1 Optical Properties
1.1 Luster
Pearly, Greasy
Vitreous, Greasy, Pearly
1.2 Pleochroism
For violet varieties
Faint
1.3 Dispersion
0.01NA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Transparent
Gemmological Tables (2004) More from other references
1.5 Refractive Index
1.570-1.6141.717-1.722
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Orthorhombic
Hexagonal
1.8 Birefringence
0.042-0.0440.100
Achroite
0 0.296
1.9 Clarity
Transparent
TransparentUlrich Henn and Claudio C. Milisenda

Anhydrite and Bastnasite Optic Character

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

Similar to their colors, Anhydrite and Bastnasite 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.