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Bustamite
Bustamite

Euclase
Euclase



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Bustamite
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Euclase

Bustamite and Euclase Optical Properties

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Optical Properties

Luster

Vitreous
Vitreous

Pleochroism

Weak
Weak: colorless-(greenish) yellow

Dispersion

0.020.02
0.005 1
👆🏻

Transparency

Transparent, Translucent
-

Refractive Index

1.662-1.7071.650-1.677
1 3.25
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Optic Character

-
-

Crystal System

Triclinic
Monoclinic Prismatic H-M Symbol (2/m) Space Group: P 21/a

Birefringence

0.013-0.0150.019-0.025
0 0.296
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Clarity

Transparent
TransparentUlrich Henn and Claudio C. Milisenda

Bustamite and Euclase Optic Character

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

Bustamite and Euclase Transparency

Similar to their colors, Bustamite and Euclase 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, Bustamite is Transparent and Translucent while Bustamite is Transparent and Translucent in appearance.