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Dioptase
Dioptase

Almandine
Almandine



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Dioptase
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Almandine

Dioptase and Almandine Optical Properties

1 Optical Properties
1.1 Luster
Vitreous
Greasy, Vitreous
1.2 Pleochroism
Weak; dark emerald green
None
1.3 Dispersion
0.040.03
Fluorite Optical Properties
0.007 1
1.4 Transparency
TranslucentHerve Nicolas Lazzarelli
Gemmological Tables (2004) More from other references
1.5 Refractive Index
1.644-1.7201.770-1.820
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Trigonal
cubic
1.8 Birefringence
0.051-0.053Not Available
Achroite
0 0.296
1.9 Clarity
TranslucentHerve Nicolas Lazzarelli
TransparentUlrich Henn and Claudio C. Milisenda

Dioptase and Almandine Optic Character

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

Dioptase and Almandine Transparency

Similar to their colors, Dioptase 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, Dioptase is TranslucentHerve Nicolas Lazzarelli while Dioptase is TranslucentHerve Nicolas Lazzarelli in appearance.