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Cavansite
Cavansite

Bertrandite
Bertrandite



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Bertrandite

Cavansite and Bertrandite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous, Pearly
Vitreous
1.2 Pleochroism
Visible: X=Z= colorless Y= blue
none.
1.3 Dispersion
Albite Optical ..
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Fluorite Optical Properties
1.4 Transparency
Not Available
TransparentAnthony et al, Handbook of mineralogy (2001)
1.5 Refractive Index
1.542
1.583-1.614
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Orthorhombic
Orthorhombic Pyramidal H-M Symbol (mm2) Space Group: Ccm21
1.8 Birefringence
0.009
Not Available
1.9 Clarity
Not Available
TransparentAnthony et al

Cavansite and Bertrandite Optic Character

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

Cavansite and Bertrandite Transparency

Similar to their colors, Cavansite 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, Cavansite is Not Available while Cavansite is Not Available in appearance.