×

Almandine
Almandine

Anthophyllite
Anthophyllite



ADD
Compare
X
Almandine
X
Anthophyllite

Almandine and Anthophyllite Optical Properties

Optical Properties

Luster

Greasy, Vitreous
Vitreous, Pearly

Pleochroism

None
-

Dispersion

0.030.01
0.005 1
👆🏻

Transparency

-
Transparent

Refractive Index

1.770-1.8201.603-1.690
1 3.25
👆🏻

Optic Character

-
Biaxial/+

Crystal System

cubic
Orthorhombic Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P nma

Birefringence

-9999-9999
0 0.296
👆🏻

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 while Almandine is in appearance.