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Montebrasite
Montebrasite

Spinel
Spinel



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Montebrasite
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Spinel

Montebrasite and Spinel Optical Properties

Optical Properties

Luster

-
Vitreous

Pleochroism

-
Absent

Dispersion

0.020.02
0.005 1
👆🏻

Transparency

TransparentWalter Schumann
Transparent, Translucent, Transparent to translucent

Refractive Index

1.578-1.6461.73
1 3.25
👆🏻

Optic Character

-
-

Crystal System

-
Isometric

Birefringence

0.020-0.030-9999
0 0.296
👆🏻

Clarity

TransparentWalter Schumann
TransparentUlrich Henn and Claudio C. Milisenda

Montebrasite and Spinel Optic Character

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

Similar to their colors, Montebrasite and Spinel 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.