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Sillimanite
Sillimanite

Tigers Eye
Tigers Eye



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Sillimanite
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Tigers Eye

Sillimanite and Tigers Eye Optical Properties

1 Optical Properties
1.1 Luster
Vitreous, Subadamantine, Silky
Silky
1.2 Pleochroism
Colourless to pale brown to yellow
Not Available
1.3 Dispersion
NANone
Fluorite Optical Properties
0.007 1
1.4 Transparency
Transparent, Translucent
Opaque
1.5 Refractive Index
1.653-1.6851.534-1.540
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Orthorhombic
Trigonal
1.8 Birefringence
0.020-0.022Not Available
Achroite
0 0.296
1.9 Clarity
Transparent
Gemstones of the world (2001) More from other references

Sillimanite and Tigers Eye Optic Character

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

Sillimanite and Tigers Eye Transparency

Similar to their colors, Sillimanite and Tigers Eye 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, Sillimanite is Translucent and Transparent while Sillimanite is Translucent and Transparent in appearance.