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Mother of Pearl
Mother of Pearl

Bertrandite
Bertrandite



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Mother of Pearl
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Bertrandite

Mother of Pearl and Bertrandite Optical Properties

1 Optical Properties
1.1 Luster
Not Available
Vitreous
1.2 Pleochroism
Not Available
none.
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Gemmological Tables (2004)
TransparentAnthony et al, Handbook of mineralogy (2001)
1.5 Refractive Index
1.53-1.691.583-1.614
Agate Opal
1 3.25
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
0.16Not Available
Achroite
0 0.296
1.9 Clarity
Gemmological Tables (2004)
TransparentAnthony et al

Mother of Pearl and Bertrandite Optic Character

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

Mother of Pearl and Bertrandite Transparency

Similar to their colors, Mother of Pearl 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, Mother of Pearl is Gemmological Tables (2004) while Mother of Pearl is Gemmological Tables (2004) in appearance.