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Prase
Prase

Sunstone
Sunstone



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Prase
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Sunstone

Prase and Sunstone Optical Properties

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Optical Properties

Luster

-
Vitreous

Pleochroism

-
Weak or absentWalter Schumann

Dispersion

0.010.01
0.005 1
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Transparency

Transparent, Translucent
Transparent, Translucent, Transparent to translucent

Refractive Index

1.544-1.5531.53-1.55
1 3.25
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Optic Character

-
-

Crystal System

-
Triclinic

Birefringence

0.0090.007-0.010
0 0.296
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Clarity

Transparent
Transparent to translucent

Prase and Sunstone Optic Character

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

Similar to their colors, Prase and Sunstone 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.