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Aragonite
Aragonite

Dravite
Dravite



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Aragonite
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Dravite

Aragonite and Dravite Optical Properties

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Optical Properties

Luster

Vitreous, Resinous
Vitreous

Pleochroism

StrongArthur Thomas
Very strong: pale yellow colorless

Dispersion

0.170.02
0.005 1
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Transparency

Transparent, Translucent
Transparent

Refractive Index

1.525-1.6861.614-1.666
1 3.25
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Optic Character

-
-

Crystal System

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

Birefringence

0.1550.014-0.032
0 0.296
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Clarity

Transparent
Transparent

Aragonite and Dravite Optic Character

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

Aragonite and Dravite Transparency

Similar to their colors, Aragonite 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, Aragonite is Transparent and Translucent while Aragonite is Transparent and Translucent in appearance.