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Boracite
Boracite

Euclase
Euclase



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Boracite
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Euclase

Boracite and Euclase Optical Properties

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Optical Properties

Luster

Vitreous, Adamantine
Vitreous

Pleochroism

None
Weak: colorless-(greenish) yellow

Dispersion

-0.02
0.005 1
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Transparency

Transparent
-

Refractive Index

1.658-1.6731.650-1.677
1 3.25
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Optic Character

-
-

Crystal System

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

Birefringence

0.010-0.0110.019-0.025
0 0.296
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Clarity

Transparent
TransparentUlrich Henn and Claudio C. Milisenda

Boracite and Euclase Optic Character

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

Boracite and Euclase Transparency

Similar to their colors, Boracite 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, Boracite is Transparent while Boracite is Transparent in appearance.