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Steatite
Steatite

Alexandrite
Alexandrite



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Alexandrite

Steatite and Alexandrite Optical Properties

1 Optical Properties
1.1 Luster
Not Available
Vitreous
1.2 Pleochroism
Not Available
Not Available
1.3 Dispersion
Albite Optical ..
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Fluorite Optical Properties
1.4 Transparency
Gemmological Tables (2004)
Transparent, Transparent to nearly opaque
1.5 Refractive Index
1.539-1.596
1.739-1.770
1.6 Optic Character
Not Available
Biaxial/+
1.7 Crystal System
Not Available
Orthorhombic
1.8 Birefringence
0.046-0.050
0.007-0.010
1.9 Clarity
OpaqueUlrich Henn and Claudio C. Milisenda
Transparent

Steatite and Alexandrite Optic Character

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

Steatite and Alexandrite Transparency

Similar to their colors, Steatite and Alexandrite 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, Steatite is Gemmological Tables (2004) while Steatite is Gemmological Tables (2004) in appearance.

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