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Bastnasite
Bastnasite

Mimetite
Mimetite



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Bastnasite
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Mimetite

Bastnasite and Mimetite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous, Greasy, Pearly
Resinous, Subadamantine
1.2 Pleochroism
Faint
Weak
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Gemmological Tables (2004) More from other references
Translucent
1.5 Refractive Index
1.717-1.7222.106-2.263
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Hexagonal
Hexagonal
1.8 Birefringence
0.1000.019
Achroite
0 0.296
1.9 Clarity
TransparentUlrich Henn and Claudio C. Milisenda
Translucent

Bastnasite and Mimetite Optic Character

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

Similar to their colors, Bastnasite and Mimetite 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.