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Dravite
Dravite

Jasper
Jasper



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Dravite
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Jasper

Dravite and Jasper Optical Properties

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1 Optical Properties
1.1 Luster
Vitreous
Vitreous
1.2 Pleochroism
Very strong: pale yellow colorless
AbsentWalter Schumann
1.3 Dispersion
0.02None
Fluorite Optical Properties
0.007 1
1.4 Transparency
Transparent
Opaque
1.5 Refractive Index
1.614-1.6661.540
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Trigonal Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m
Trigonal
1.8 Birefringence
0.014-0.032Not Available
Achroite
0 0.296
1.9 Clarity
Transparent
OpaqueHerve Nicolas Lazzarelli

Dravite and Jasper Optic Character

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

Dravite and Jasper Transparency

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