Dravite and Verdite Optical Properties

Dravite

Verdite

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1 Optical Properties

1.1 Luster

Vitreous

Vitreous, Silky

1.2 Pleochroism

Very strong: pale yellow colorless

Extreme

1.3 Dispersion

0.02NA

0.007 1

1.4 Transparency

Transparent

Translucent

1.5 Refractive Index

1.614-1.6661.580

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

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

Monoclinic Prismatic H-M Symbol (2/m) Space Group: C 2/c

1.8 Birefringence

0.014-0.032Not Available

0 0.296

1.9 Clarity

Transparent

Translucent

Dravite and Verdite Optic Character

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

Similar to their colors, Dravite and Verdite 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.