Dravite and Clinochlore Optical Properties

Dravite

Clinochlore

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1 Optical Properties

1.1 Luster

Vitreous

Pearly, Greasy

1.2 Pleochroism

Very strong: pale yellow colorless

Distinct: light yellow-green to light bluE

1.3 Dispersion

0.02NA

0.007 1

1.4 Transparency

Transparent

1.5 Refractive Index

1.614-1.6661.571-1.597

1 3.25

1.6 Optic Character

Not Available

Biaxial/+

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/m

1.8 Birefringence

0.014-0.032Not Available

0 0.296

1.9 Clarity

Transparent

Dravite and Clinochlore Optic Character

Dravite and Clinochlore optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Dravite and Clinochlore 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 Clinochlore 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. Clinochlore has Biaxial/+ character.

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Dravite and Clinochlore Transparency

Similar to their colors, Dravite and Clinochlore 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.