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Sylvite
Sylvite

Phosgenite
Phosgenite



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Sylvite
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Phosgenite

Sylvite and Phosgenite Optical Properties

Optical Properties

Luster

Vitreous
Adamantine

Pleochroism

Visible in colored crystals
Weakly pleochroic with O reddish and E greenish in thick sections.

Dispersion

0.010.04
0.005 1
👆🏻

Transparency

-
-

Refractive Index

1.49032.117-2.145
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Isometric
tetragonal

Birefringence

-99990.027
0 0.296
👆🏻

Clarity

-
TransparentUlrich Henn and Claudio C. Milisenda

Sylvite and Phosgenite Optic Character

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

Sylvite and Phosgenite Transparency

Similar to their colors, Sylvite and Phosgenite 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, Sylvite is while Sylvite is in appearance.