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Apatite and Rock Crystal Optical Properties


Rock Crystal and Apatite Optical Properties


Optical Properties

Luster
Vitreous   
Not Available   

Pleochroism
Blue stones – strong   
AbsentWalter Schumann   

Dispersion
0.01   
27
0.01   
27

Transparency
Gemmological Tables (2004) More from other references   
TransparentWalter Schumann, Gemstones of the world (2001) More from other references   

Refractive Index
1.628-1.651   
1.544-1.553   

Optic Character
Not Available   
Not Available   

Crystal System
Hexagonal   
Not Available   

Birefringence
0.002-0.008   
0.009   

Clarity
TransparentUlrich Henn and Claudio C. Milisenda   
TransparentWalter Schumann   

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Apatite and Rock Crystal Optic Character

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

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Apatite and Rock Crystal Transparency

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

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