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Amethyst
Amethyst

Rosasite
Rosasite



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X
Amethyst
X
Rosasite

Amethyst and Rosasite Optical Properties

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Optical Properties

Luster

Vitreous
Silky, Vitreous

Pleochroism

None
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, Transparent to translucent
-

Refractive Index

1.544-1.5531.672-1.688
1 3.25
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Optic Character

-
-

Crystal System

Trigonal
monoclinic

Birefringence

0.0090.139-0.143
0 0.296
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Clarity

Transparent
-

Amethyst and Rosasite Optic Character

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

Amethyst and Rosasite Transparency

Similar to their colors, Amethyst 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, Amethyst is Transparent and Transparent to translucent while Amethyst is Transparent and Transparent to translucent in appearance.