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Povondraite
Povondraite

Cryolite
Cryolite



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Povondraite
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Cryolite

Povondraite and Cryolite Optical Properties

1 Optical Properties
1.1 Luster
Resinous
Vitreous, Greasy, Pearly
1.2 Pleochroism
Strong: yellow-brown
colorless.
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Translucent
Gemmological Tables (2004) More from other references
1.5 Refractive Index
Not Available1.338-1.339
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Not Available
monoclinic
1.8 Birefringence
Not Available0.001
Achroite
0 0.296
1.9 Clarity
Translucent
TransparentUlrich Henn and Claudio C. Milisenda

Povondraite and Cryolite Optic Character

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

Povondraite and Cryolite Transparency

Similar to their colors, Povondraite and Cryolite 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, Povondraite is Translucent while Povondraite is Translucent in appearance.