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Elbaite
Elbaite

Demantoid
Demantoid



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Elbaite
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Demantoid

Elbaite and Demantoid Optical Properties

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Optical Properties

Luster

Vitreous
Adamantine

Pleochroism

Pale green
None

Dispersion

0.020.06
0.005 1
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Transparency

Transparent
-

Refractive Index

1.614-1.6661.880-1.890
1 3.25
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Optic Character

-
-

Crystal System

Trigonal
cubic

Birefringence

0.014-0.032-9999
0 0.296
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Clarity

Transparent
TransparentUlrich Henn and Claudio C. Milisenda

Elbaite and Demantoid Optic Character

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

Elbaite and Demantoid Transparency

Similar to their colors, Elbaite and Demantoid 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, Elbaite is Transparent while Elbaite is Transparent in appearance.