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Peridot
Peridot

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Dravite



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Peridot and Dravite Optical Properties

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1 Optical Properties
1.1 Luster
Vitreous, Greasy
Vitreous
1.2 Pleochroism
Weak: yellow-green green (colorless)Herve Nicolas Lazzarelli
Very strong: pale yellow colorless
1.3 Dispersion
Albite Optical ..
0.02
Rank: 18 (Overall)
0.02
Rank: 22 (Overall)
Fluorite Optical Properties
1.4 Transparency
Transparent
Transparent
1.5 Refractive Index
1.64-1.69
1.614-1.666
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Orthorhombic
Trigonal Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m
1.8 Birefringence
0.036
0.014-0.032
1.9 Clarity
Transparent
Transparent

Peridot and Dravite Optic Character

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

Peridot and Dravite Transparency

Similar to their colors, Peridot and Dravite 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, Peridot is Transparent while Peridot is Transparent in appearance.