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Bertrandite
Bertrandite

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Bertrandite and Adamite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous
Vitreous
1.2 Pleochroism
none.
NilArthur Thomas
1.3 Dispersion
Albite Optical ..
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Fluorite Optical Properties
1.4 Transparency
TransparentAnthony et al, Handbook of mineralogy (2001)
Transparent
1.5 Refractive Index
1.583-1.614
1.708-1.722
1.6 Optic Character
Not Available
Biaxial/+
1.7 Crystal System
Orthorhombic Pyramidal H-M Symbol (mm2) Space Group: Ccm21
Orthorhombic
1.8 Birefringence
Not Available
0.031-0.050
1.9 Clarity
TransparentAnthony et al
Transparent

Bertrandite and Adamite Optic Character

Bertrandite and Adamite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Bertrandite and Adamite 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 Bertrandite and Adamite 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. Adamite has Biaxial/+ character.

Bertrandite and Adamite Transparency

Similar to their colors, Bertrandite and Adamite 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, Bertrandite is Handbook of mineralogy (2001) and TransparentAnthony et al while Bertrandite is Handbook of mineralogy (2001) and TransparentAnthony et al in appearance.