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Charoite
Charoite

Grandidierite
Grandidierite



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Charoite
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Grandidierite

Charoite and Grandidierite Optical Properties

1 Optical Properties
1.1 Luster
Pearly, Fibrous, Chatoyant
Vitreous, Pearly
1.2 Pleochroism
NilArthur Thomas
visible
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
1.545-1.5601.578-1.639
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Triclinic
Orthorhombic
1.8 Birefringence
0.0090.037-0.039
Achroite
0 0.296
1.9 Clarity
Translucent
Gemmological Tables (2004) More from other references

Charoite and Grandidierite Optic Character

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

Charoite and Grandidierite Transparency

Similar to their colors, Charoite and Grandidierite 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, Charoite is Translucent while Charoite is Translucent in appearance.