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Euclase
Euclase

Danburite
Danburite



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Euclase
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Danburite

Euclase and Danburite Optical Properties

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Optical Properties

Luster

Vitreous
Vitreous, Greasy

Pleochroism

Weak: colorless-(greenish) yellow
Weak: pale yellow yellow

Dispersion

0.020.02
0.005 1
👆🏻

Transparency

-
-

Refractive Index

1.650-1.6771.627-1.639
1 3.25
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Optic Character

-
Biaxial/+

Crystal System

Monoclinic Prismatic H-M Symbol (2/m) Space Group: P 21/a
Orthorhombic

Birefringence

0.019-0.0250.006
0 0.296
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Clarity

TransparentUlrich Henn and Claudio C. Milisenda
TransparentUlrich Henn and Claudio C. Milisenda

Euclase and Danburite Optic Character

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

Euclase and Danburite Transparency

Similar to their colors, Euclase 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, Euclase is while Euclase is in appearance.