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Andalusite
Andalusite

Almandine
Almandine



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Andalusite
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Almandine

Andalusite and Almandine Optical Properties

1 Optical Properties
1.1 Luster
Vitreous, Greasy
Greasy, Vitreous
1.2 Pleochroism
strongly trichroic
None
1.3 Dispersion
Albite Optical ..
0.02
Rank: 23 (Overall)
0.03
Rank: 15 (Overall)
Fluorite Optical Properties
1.4 Transparency
Transparent, Translucent
Gemmological Tables (2004) More from other references
1.5 Refractive Index
1.627-1.650
1.770-1.820
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Orthorhombic
cubic
1.8 Birefringence
0.009-0.010
Not Available
1.9 Clarity
Transparent
TransparentUlrich Henn and Claudio C. Milisenda

Andalusite and Almandine Optic Character

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

Andalusite and Almandine Transparency

Similar to their colors, Andalusite 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, Andalusite is Translucent and Transparent while Andalusite is Translucent and Transparent in appearance.

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