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Rosasite
Rosasite

Dravite
Dravite



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Rosasite
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Dravite

Rosasite and Dravite Optical Properties

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Optical Properties

Luster

Silky, Vitreous
Vitreous

Pleochroism

Strong: X = pale emerald green or colourless; Y = dark emerald green or pale blue; Z = dark emerald green or pale blue
Very strong: pale yellow colorless

Dispersion

0.030.02
0.005 1
👆🏻

Transparency

-
Transparent

Refractive Index

1.672-1.6881.614-1.666
1 3.25
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Optic Character

-
-

Crystal System

monoclinic
Trigonal Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m

Birefringence

0.139-0.1430.014-0.032
0 0.296
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Clarity

-
Transparent

Rosasite and Dravite Optic Character

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

Rosasite and Dravite Transparency

Similar to their colors, Rosasite 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, Rosasite is while Rosasite is in appearance.