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Amblygonite and Legrandite Optical Properties


Legrandite and Amblygonite Optical Properties


Optical Properties

Luster
Vitreous, Pearly   
Vitreous   

Pleochroism
weak to none   
Colorless   

Dispersion
0.01   
26
Not Available   

Transparency
Gemmological Tables (2004) More from other references   
Gems   

Refractive Index
1.578-1.646   
1.702-1.740   

Optic Character
Biaxial/+   
Not Available   

Crystal System
Triclinic   
monoclinic   

Birefringence
0.020-0.030   
0.060   

Clarity
TransparentUlrich Henn and Claudio C. Milisenda   
Gems   

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Amblygonite and Legrandite Optic Character

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

Similar to their colors, Amblygonite and Legrandite 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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