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Ettringite
Ettringite

Stolzite
Stolzite



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Ettringite
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Stolzite

Ettringite and Stolzite Optical Properties

Optical Properties

Luster

Vitreous
Resinous, Subadamantine

Pleochroism

-
-

Dispersion

0.040.03
0.005 1
👆🏻

Transparency

Transparent, Translucent
-

Refractive Index

1.470-1.4912.180-2.190
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Trigonal
tetragonal

Birefringence

0.0210.090
0 0.296
👆🏻

Clarity

Transparent
-

Ettringite and Stolzite Optic Character

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

Ettringite and Stolzite Transparency

Similar to their colors, Ettringite and Stolzite 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, Ettringite is Transparent and Translucent while Ettringite is Transparent and Translucent in appearance.