Home
Gemstones


Almandine and Goethite Optical Properties


Goethite and Almandine Optical Properties


Optical Properties

Luster
Greasy, Vitreous   
Adamantine   

Pleochroism
None   
VisibleArthur Thomas   

Dispersion
0.03   
15
Not Available   

Transparency
Gemmological Tables (2004) More from other references   
Gemstones (2009)   

Refractive Index
1.770-1.820   
2.26-2.398   

Optic Character
Not Available   
Not Available   

Crystal System
cubic   
Orthorhombic   

Birefringence
Not Available   
0.138   

Clarity
TransparentUlrich Henn and Claudio C. Milisenda   
Gemstones (2009)   

Benefits >>
<< Physical Properties

Almandine and Goethite Optic Character

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

Compare Red Gemstones

Almandine and Goethite Transparency

Similar to their colors, Almandine and Goethite 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.

Red Gemstones

Red Gemstones


Compare Red Gemstones