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Willemite
Willemite

Sunstone
Sunstone



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Willemite
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Sunstone

Willemite and Sunstone Optical Properties

Optical Properties

Luster

Vitreous, Resinous
Vitreous

Pleochroism

-
Weak or absentWalter Schumann

Dispersion

0.170.01
0.005 1
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Transparency

Transparent, Translucent
Transparent, Translucent, Transparent to translucent

Refractive Index

1.687-1.7231.53-1.55
1 3.25
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Optic Character

-
-

Crystal System

Trigonal
Triclinic

Birefringence

0.028-0.0300.007-0.010
0 0.296
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Clarity

Transparent
Transparent to translucent

Willemite and Sunstone Optic Character

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

Willemite and Sunstone Transparency

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