Quartz and Dravite Optical Properties

Quartz

Dravite

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1 Optical Properties

1.1 Luster

Vitreous

1.2 Pleochroism

None

Very strong: pale yellow colorless

1.3 Dispersion

0.010.02

0.007 1

1.4 Transparency

Transparent, Translucent, Transparent to translucent

Transparent

1.5 Refractive Index

1.544-1.5531.614-1.666

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Trigonal

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

1.8 Birefringence

0.0090.014-0.032

0 0.296

1.9 Clarity

Opaque

Transparent

Quartz and Dravite Optic Character

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

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Quartz and Dravite Transparency

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