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Shigaite
Shigaite

Prasiolite
Prasiolite



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Shigaite
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Prasiolite

Shigaite and Prasiolite Optical Properties

Optical Properties

Luster

Vitreous
Vitreous

Pleochroism

Distinct
Very weak: light green pale greenWalter Schumann

Dispersion

0.050.01
0.005 1
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Transparency

-
Transparent, Translucent

Refractive Index

1.5461.544-1.553
1 3.25
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Optic Character

-
-

Crystal System

Trigonal
Trigonal

Birefringence

-99990.009
0 0.296
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Clarity

-
Transparent

Shigaite and Prasiolite Optic Character

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

Shigaite and Prasiolite Transparency

Similar to their colors, Shigaite and Prasiolite 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, Shigaite is while Shigaite is in appearance.