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Bastnasite
Bastnasite

Ammolite
Ammolite



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Bastnasite
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Ammolite

Bastnasite and Ammolite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous, Greasy, Pearly
Silky, Vitreous
1.2 Pleochroism
Faint
None
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Gemmological Tables (2004) More from other references
Not Available
1.5 Refractive Index
1.717-1.7221.520-1.670
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Hexagonal
Trigonal
1.8 Birefringence
0.1000.135-0.145
Achroite
0 0.296
1.9 Clarity
TransparentUlrich Henn and Claudio C. Milisenda
Not Available

Bastnasite and Ammolite Optic Character

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

Bastnasite and Ammolite Transparency

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