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Bertrandite
Bertrandite

Azurmalachite
Azurmalachite



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Bertrandite
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Azurmalachite

Bertrandite and Azurmalachite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous
Vitreous, Silky
1.2 Pleochroism
none.
AbsentWalter Schumann
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)
Translucent
1.5 Refractive Index
1.583-1.614
1.655-1.909
1.6 Optic Character
Not Available
Biaxial/+
1.7 Crystal System
Orthorhombic Pyramidal H-M Symbol (mm2) Space Group: Ccm21
monoclinic
1.8 Birefringence
Not Available
0.108-0.254
1.9 Clarity
TransparentAnthony et al
Translucent

Bertrandite and Azurmalachite Optic Character

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

Bertrandite and Azurmalachite Transparency

Similar to their colors, Bertrandite and Azurmalachite 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.