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Montebrasite
Montebrasite

Phosgenite
Phosgenite



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Montebrasite
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Phosgenite

Montebrasite and Phosgenite Optical Properties

Optical Properties

Luster

-
Adamantine

Pleochroism

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

Dispersion

0.020.04
0.005 1
👆🏻

Transparency

TransparentWalter Schumann
-

Refractive Index

1.578-1.6462.117-2.145
1 3.25
👆🏻

Optic Character

-
-

Crystal System

-
tetragonal

Birefringence

0.020-0.0300.027
0 0.296
👆🏻

Clarity

TransparentWalter Schumann
TransparentUlrich Henn and Claudio C. Milisenda

Montebrasite and Phosgenite Optic Character

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

Montebrasite and Phosgenite Transparency

Similar to their colors, Montebrasite 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, Montebrasite is TransparentWalter Schumann while Montebrasite is TransparentWalter Schumann in appearance.