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Mother of Pearl
Mother of Pearl

Sillimanite
Sillimanite



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Mother of Pearl
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Sillimanite

Mother of Pearl and Sillimanite Optical Properties

1 Optical Properties
1.1 Luster
Not Available
Vitreous, Subadamantine, Silky
1.2 Pleochroism
Not Available
Colourless to pale brown to yellow
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Gemmological Tables (2004)
Transparent, Translucent
1.5 Refractive Index
1.53-1.691.653-1.685
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Not Available
Orthorhombic
1.8 Birefringence
0.160.020-0.022
Achroite
0 0.296
1.9 Clarity
Gemmological Tables (2004)
Transparent

Mother of Pearl and Sillimanite Optic Character

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

Similar to their colors, Mother of Pearl and Sillimanite 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.