Vlasovite and Dravite Optical Properties

Vlasovite

Dravite

Add ⊕

1 Optical Properties

1.1 Luster

Greasy, Vitreous, Pearly

Vitreous

1.2 Pleochroism

(x): colorless. (y): colorless. (z): colorless.

Very strong: pale yellow colorless

1.3 Dispersion

NA0.02

0.007 1

1.4 Transparency

Not Available

Transparent

1.5 Refractive Index

1.6071.614-1.666

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

monoclinic

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

1.8 Birefringence

Not Available0.014-0.032

0 0.296

1.9 Clarity

Not Available

Transparent

Vlasovite and Dravite Optic Character

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

Compare Brown Gemstones

Vlasovite Vs Alabaster

Vlasovite Vs Allanite

Vlasovite Vs Adamite

Vlasovite and Dravite Transparency

Similar to their colors, Vlasovite 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, Vlasovite is Not Available while Vlasovite is Not Available in appearance.