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Steatite
Steatite

Chalcedony
Chalcedony



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Steatite
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Chalcedony

Steatite and Chalcedony Optical Properties

Optical Properties

Luster

-
Vitreous

Pleochroism

-
-

Dispersion

0.010.01
0.005 1
👆🏻

Transparency

-
Translucent, Translucent to opaque

Refractive Index

1.539-1.5961.530-1.543
1 3.25
👆🏻

Optic Character

-
-

Crystal System

-
Trigonal

Birefringence

0.046-0.0500.003-0.009
0 0.296
👆🏻

Clarity

OpaqueUlrich Henn and Claudio C. Milisenda
Translucent

Steatite and Chalcedony Optic Character

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

Steatite and Chalcedony Transparency

Similar to their colors, Steatite and Chalcedony 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 while Steatite is in appearance.