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Prasiolite
Prasiolite

Staurolite
Staurolite



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X
Prasiolite
X
Staurolite

Prasiolite and Staurolite Optical Properties

Optical Properties

Luster

Vitreous
Resinous

Pleochroism

Very weak: light green pale greenWalter Schumann
X = colorless; Y = pale yellow; Z = golden yellow

Dispersion

0.010.02
0.005 1
👆🏻

Transparency

Transparent, Translucent
-

Refractive Index

1.544-1.5531.736-1.762
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Trigonal
monoclinic

Birefringence

0.0090.009-0.015
0 0.296
👆🏻

Clarity

Transparent
-

Prasiolite and Staurolite Optic Character

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

Prasiolite and Staurolite Transparency

Similar to their colors, Prasiolite and Staurolite 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, Prasiolite is Transparent and Translucent while Prasiolite is Transparent and Translucent in appearance.