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Pollucite
Pollucite

Sphene
Sphene



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Pollucite
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Sphene

Pollucite and Sphene Optical Properties

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Optical Properties

Luster

Vitreous, Greasy
-

Pleochroism

-
-

Dispersion

0.010.05
0.005 1
👆🏻

Transparency

Transparent, Translucent
-

Refractive Index

1.517-1.5251.84-2.11
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Isometric
monoclinic

Birefringence

-9999-9999
0 0.296
👆🏻

Clarity

Transparent
-

Pollucite and Sphene Optic Character

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

Pollucite and Sphene Transparency

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