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Legrandite
Legrandite

Danburite
Danburite



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Legrandite
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Danburite

Legrandite and Danburite Optical Properties

Optical Properties

Luster

Vitreous
Vitreous, Greasy

Pleochroism

Colorless
Weak: pale yellow yellow

Dispersion

0.030.02
0.005 1
👆🏻

Transparency

-
-

Refractive Index

1.702-1.7401.627-1.639
1 3.25
👆🏻

Optic Character

-
Biaxial/+

Crystal System

monoclinic
Orthorhombic

Birefringence

0.0600.006
0 0.296
👆🏻

Clarity

-
TransparentUlrich Henn and Claudio C. Milisenda

Legrandite and Danburite Optic Character

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

Legrandite and Danburite Transparency

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