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Pearl and Bastnasite Optical Properties

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1 Optical Properties
1.1 Luster
Pearly
Vitreous, Greasy, Pearly
1.2 Pleochroism
AbsentWalter Schumann
Faint
1.3 Dispersion
Albite Optical ..
None
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Fluorite Optical Properties
1.4 Transparency
Translucent, Opaque
Gemmological Tables (2004) More from other references
1.5 Refractive Index
1.52-1.66
1.717-1.722
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Orthorhombic
Hexagonal
1.8 Birefringence
0.156
0.100
1.9 Clarity
Translucent
TransparentUlrich Henn and Claudio C. Milisenda

Pearl and Bastnasite Optic Character

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

Pearl and Bastnasite Transparency

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