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Almandine
Almandine

Beryl
Beryl



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Almandine
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Beryl

Almandine and Beryl Optical Properties

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Optical Properties

Luster

Greasy, Vitreous
Vitreous, Resinous

Pleochroism

None
Weak to distinct

Dispersion

0.030.01
0.005 1
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Transparency

-
Transparent, Transparent to opaque

Refractive Index

1.770-1.8201.560-1.604
1 3.25
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Optic Character

-
-

Crystal System

cubic
Hexagonal

Birefringence

-99990.0040-0.0070
0 0.296
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Clarity

TransparentUlrich Henn and Claudio C. Milisenda
Transparent

Almandine and Beryl Optic Character

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

Almandine and Beryl Transparency

Similar to their colors, Almandine and Beryl 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, Almandine is while Almandine is in appearance.