Home
Gemstones


Topaz and Apatite Optical Properties


Apatite and Topaz Optical Properties


Optical Properties

Luster
Vitreous   
Vitreous   

Pleochroism
Weak   
Blue stones – strong   

Dispersion
0.01   
26
0.01   
27

Transparency
Transparent   
Gemmological Tables (2004) More from other references   

Refractive Index
1.606-1.644   
1.628-1.651   

Optic Character
Not Available   
Not Available   

Crystal System
Orthorhombic   
Hexagonal   

Birefringence
0.008-0.011   
0.002-0.008   

Clarity
TransparentUlrich Henn and Claudio C. Milisenda   
TransparentUlrich Henn and Claudio C. Milisenda   

Benefits >>
<< Physical Properties

Topaz and Apatite Optic Character

Topaz and Apatite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Topaz and Apatite 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 Topaz and Apatite 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 Gems for Sagittarius

Topaz and Apatite Transparency

Similar to their colors, Topaz and Apatite 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, Topaz is Transparent while Topaz is Transparent in appearance.

Gems for Sagittarius

Gems for Sagittarius


Compare Gems for Sagittarius