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Willemite
Willemite

Almandine
Almandine



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Willemite
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Almandine

Willemite and Almandine Optical Properties

Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
Vitreous, Resinous
-
0.17
Transparent, Translucent
1.687-1.723
-
Trigonal
0.028-0.030
Transparent
 
Greasy, Vitreous
None
0.03
-
1.770-1.820
-
cubic
-9999
TransparentUlrich Henn and Claudio C. Milisenda

Willemite and Almandine Optic Character

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

Willemite and Almandine Transparency

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