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Dravite
Dravite

Alabaster
Alabaster



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Dravite
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Alabaster

Dravite and Alabaster Optical Properties

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1 Optical Properties
1.1 Luster
Vitreous
Not Available
1.2 Pleochroism
Very strong: pale yellow colorless
Not Available
1.3 Dispersion
0.02None
Fluorite Optical Properties
0.007 1
1.4 Transparency
Transparent
Translucent
1.5 Refractive Index
1.614-1.6661.520-1.530
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
Not Available
1.8 Birefringence
0.014-0.0320.010
Achroite
0 0.296
1.9 Clarity
Transparent
Translucent

Dravite and Alabaster Optic Character

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

Similar to their colors, Dravite and Alabaster 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.