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Almandine
Almandine

Anthophyllite
Anthophyllite



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Almandine
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Anthophyllite

Almandine and Anthophyllite Optical Properties

1 Optical Properties
1.1 Luster
Greasy, Vitreous
Vitreous, Pearly
1.2 Pleochroism
None
When Fe-rich
1.3 Dispersion
0.03NA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Gemmological Tables (2004) More from other references
Transparent
1.5 Refractive Index
1.770-1.8201.603-1.690
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Biaxial/+
1.7 Crystal System
cubic
Orthorhombic Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P nma
1.8 Birefringence
Not AvailableNot Available
Achroite
0 0.296
1.9 Clarity
TransparentUlrich Henn and Claudio C. Milisenda
Transparent

Almandine and Anthophyllite Optic Character

Almandine and Anthophyllite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Almandine and Anthophyllite 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 Anthophyllite 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. Anthophyllite has Biaxial/+ character.

Almandine and Anthophyllite Transparency

Similar to their colors, Almandine and Anthophyllite 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 Gemmological Tables (2004) More from other references while Almandine is Gemmological Tables (2004) More from other references in appearance.