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Prase
Prase

Willemite
Willemite



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Prase
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Willemite

Prase and Willemite Optical Properties

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Optical Properties

Luster

-
Vitreous, Resinous

Pleochroism

-
-

Dispersion

0.010.17
0.005 1
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Transparency

Transparent, Translucent
Transparent, Translucent

Refractive Index

1.544-1.5531.687-1.723
1 3.25
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Optic Character

-
-

Crystal System

-
Trigonal

Birefringence

0.0090.028-0.030
0 0.296
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Clarity

Transparent
Transparent

Prase and Willemite Optic Character

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

Prase and Willemite Transparency

Similar to their colors, Prase and Willemite 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, Prase is Transparent and Translucent while Prase is Transparent and Translucent in appearance.