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Allanite
Allanite

Almandine
Almandine



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Allanite and Almandine Optical Properties

1 Optical Properties
1.1 Luster
Not Available
Greasy, Vitreous
1.2 Pleochroism
Not Available
None
1.3 Dispersion
Albite Optical ..
Not Available
Rank: N/A (Overall)
0.03
Rank: 15 (Overall)
Fluorite Optical Properties
1.4 Transparency
Not Available
Gemmological Tables (2004) More from other references
1.5 Refractive Index
1
1.770-1.820
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Not Available
cubic
1.8 Birefringence
0.013-0.036
Not Available
1.9 Clarity
Not Available
TransparentUlrich Henn and Claudio C. Milisenda

Allanite and Almandine Optic Character

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

Allanite and Almandine Transparency

Similar to their colors, Allanite 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, Allanite is Not Available while Allanite is Not Available in appearance.