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Clinothulite
Clinothulite

Danburite
Danburite



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Clinothulite
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Danburite

Clinothulite and Danburite Optical Properties

Optical Properties

Luster

-
Vitreous, Greasy

Pleochroism

-
Weak: pale yellow yellow

Dispersion

0.020.02
0.005 1
👆🏻

Transparency

-
-

Refractive Index

-99991.627-1.639
1 3.25
👆🏻

Optic Character

-
Biaxial/+

Crystal System

-
Orthorhombic

Birefringence

-99990.006
0 0.296
👆🏻

Clarity

-
TransparentUlrich Henn and Claudio C. Milisenda

Clinothulite and Danburite Optic Character

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

Clinothulite and Danburite Transparency

Similar to their colors, Clinothulite and Danburite 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, Clinothulite is while Clinothulite is in appearance.