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Amblygonite and Apatite Optical Properties


Apatite and Amblygonite Optical Properties


Optical Properties

Luster
Vitreous, Pearly   
Vitreous   

Pleochroism
weak to none   
Blue stones – strong   

Dispersion
0.01   
26
0.01   
27

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

Refractive Index
1.578-1.646   
1.628-1.651   

Optic Character
Biaxial/+   
Not Available   

Crystal System
Triclinic   
Hexagonal   

Birefringence
0.020-0.030   
0.002-0.008   

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

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Amblygonite and Apatite Optic Character

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

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Amblygonite and Apatite Transparency

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

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