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Pleonaste
Pleonaste

Bertrandite
Bertrandite



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Bertrandite

Pleonaste and Bertrandite Optical Properties

1 Optical Properties
1.1 Luster
Not Available
Vitreous
1.2 Pleochroism
Not Available
none.
1.3 Dispersion
Albite Optical ..
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Fluorite Optical Properties
1.4 Transparency
Gemmological Tables (2004)
TransparentAnthony et al, Handbook of mineralogy (2001)
1.5 Refractive Index
1.780
1.583-1.614
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Not Available
Orthorhombic Pyramidal H-M Symbol (mm2) Space Group: Ccm21
1.8 Birefringence
Not Available
Not Available
1.9 Clarity
Gemmological Tables (2004)
TransparentAnthony et al

Pleonaste and Bertrandite Optic Character

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

Pleonaste and Bertrandite Transparency

Similar to their colors, Pleonaste and Bertrandite 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, Pleonaste is Gemmological Tables (2004) while Pleonaste is Gemmological Tables (2004) in appearance.