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Danburite
Danburite

Ruby
Ruby



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Danburite
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Ruby

Danburite and Ruby Optical Properties

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Optical Properties

Luster

Vitreous, Greasy
Vitreous, Adamantine

Pleochroism

Weak: pale yellow yellow
Strong: purplish-red

Dispersion

0.020.02
0.005 1
👆🏻

Transparency

-
Transparent, Translucent, Transparent to opaque

Refractive Index

1.627-1.6391.762-1.778
1 3.25
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Optic Character

Biaxial/+
-

Crystal System

Orthorhombic
Trigonal

Birefringence

0.0060.008
0 0.296
👆🏻

Clarity

TransparentUlrich Henn and Claudio C. Milisenda
Transparent

Danburite and Ruby Optic Character

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

Danburite and Ruby Transparency

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