Dravite and Bowenite Optical Properties

Dravite

Bowenite

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Optical Properties

Luster

Vitreous

Waxy, Silky, Resinous, Greasy

Pleochroism

Very strong: pale yellow colorless

Dispersion

0.020.01

0.005 1

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Transparency

Transparent

TranslucentHerve Nicolas Lazzarelli

Refractive Index

1.614-1.6661.530-1.575

1 3.25

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Optic Character

Crystal System

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

Birefringence

0.014-0.032-9999

0 0.296

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Clarity

Transparent

TranslucentHerve Nicolas Lazzarelli

Dravite and Bowenite Optic Character

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

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Dravite and Bowenite Transparency

Similar to their colors, Dravite and Bowenite 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.