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Turquoise and Bastnasite Optical Properties


Bastnasite and Turquoise Optical Properties


Optical Properties

Luster
Waxy   
Vitreous, Greasy, Pearly   

Pleochroism
Weak   
Faint   

Dispersion
None   
Not Available   

Transparency
Translucent, Opaque   
Gemmological Tables (2004) More from other references   

Refractive Index
1.610-1.650   
1.717-1.722   

Optic Character
Not Available   
Not Available   

Crystal System
Triclinic   
Hexagonal   

Birefringence
0.040   
0.100   

Clarity
Translucent   
TransparentUlrich Henn and Claudio C. Milisenda   

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Turquoise and Bastnasite Optic Character

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

Similar to their colors, Turquoise and Bastnasite 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, Turquoise is Opaque and Translucent while Turquoise is Opaque and Translucent in appearance.

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Semi Precious


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