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Gedrite
Gedrite

Grandidierite
Grandidierite



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Gedrite
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Grandidierite

Gedrite and Grandidierite Optical Properties

1 Optical Properties
1.1 Luster
Fibrous, Vitreous
Vitreous, Pearly
1.2 Pleochroism
Weak to moderate
visible
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Transparent
Gemmological Tables (2004) More from other references
1.5 Refractive Index
1.625-1.7181.578-1.639
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Orthorhombic Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P nma
Orthorhombic
1.8 Birefringence
Not Available0.037-0.039
Achroite
0 0.296
1.9 Clarity
Transparent
Gemmological Tables (2004) More from other references

Gedrite and Grandidierite Optic Character

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

Gedrite and Grandidierite Transparency

Similar to their colors, Gedrite 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, Gedrite is Transparent while Gedrite is Transparent in appearance.