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Phosgenite
Phosgenite

Ludlamite
Ludlamite



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Phosgenite
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Ludlamite

Phosgenite and Ludlamite Optical Properties

Optical Properties

Luster

Adamantine
Vitreous, Pearly

Pleochroism

Weakly pleochroic with O reddish and E greenish in thick sections.
-

Dispersion

0.040.02
0.005 1
👆🏻

Transparency

-
-

Refractive Index

2.117-2.1451.653-1.693
1 3.25
👆🏻

Optic Character

-
-

Crystal System

tetragonal
monoclinic

Birefringence

0.0270.038-0.044
0 0.296
👆🏻

Clarity

TransparentUlrich Henn and Claudio C. Milisenda
TransparentUlrich Henn and Claudio C. Milisenda

Phosgenite and Ludlamite Optic Character

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

Phosgenite and Ludlamite Transparency

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