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Coral and Bastnasite Optical Properties


Bastnasite and Coral Optical Properties


Optical Properties

Luster
Not Available   
Vitreous, Greasy, Pearly   

Pleochroism
AbsentWalter Schumann   
Faint   

Dispersion
None   
Not Available   

Transparency
Translucent   
Gemmological Tables (2004) More from other references   

Refractive Index
1.486-1.658   
1.717-1.722   

Optic Character
Not Available   
Not Available   

Crystal System
Trigonal   
Hexagonal   

Birefringence
0.160-0.172   
0.100   

Clarity
Translucent   
TransparentUlrich Henn and Claudio C. Milisenda   

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Coral and Bastnasite Optic Character

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

Similar to their colors, Coral 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, Coral is Translucent while Coral is Translucent in appearance.

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