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Montebrasite
Montebrasite

Rubellite
Rubellite



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Montebrasite
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Rubellite

Montebrasite and Rubellite Optical Properties

Optical Properties

Luster

-
-

Pleochroism

-
Strong: dark red pinkish-redHerve Nicolas Lazzarelli

Dispersion

0.020.02
0.005 1
👆🏻

Transparency

TransparentWalter Schumann
Transparent, Translucent

Refractive Index

1.578-1.6461.614-1.666
1 3.25
👆🏻

Optic Character

-
-

Crystal System

-
-

Birefringence

0.020-0.0300.014-0.040
0 0.296
👆🏻

Clarity

TransparentWalter Schumann
Transparent

Montebrasite and Rubellite Optic Character

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

Similar to their colors, Montebrasite and Rubellite 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.