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Prase
Prase

Rosasite
Rosasite



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X
Prase
X
Rosasite

Prase and Rosasite Optical Properties

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Optical Properties

Luster

-
Silky, Vitreous

Pleochroism

-
Strong: X = pale emerald green or colourless; Y = dark emerald green or pale blue; Z = dark emerald green or pale blue

Dispersion

0.010.03
0.005 1
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Transparency

Transparent, Translucent
-

Refractive Index

1.544-1.5531.672-1.688
1 3.25
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Optic Character

-
-

Crystal System

-
monoclinic

Birefringence

0.0090.139-0.143
0 0.296
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Clarity

Transparent
-

Prase and Rosasite Optic Character

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

Similar to their colors, Prase and Rosasite 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.