Corundum and Euclase Optical Properties

Corundum

Euclase

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1 Optical Properties

1.1 Luster

Adamantine, Vitreous

Vitreous

1.2 Pleochroism

None

Weak: colorless-(greenish) yellow

1.3 Dispersion

0.020.02

0.007 1

1.4 Transparency

Transparent, Translucent

Gemmological Tables (2004) More from other references

1.5 Refractive Index

1.758-1.7801.650-1.677

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Trigonal

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

1.8 Birefringence

0.007-0.0100.019-0.025

0 0.296

1.9 Clarity

Gemmological Tables (2004) More from other references

TransparentUlrich Henn and Claudio C. Milisenda

Corundum and Euclase Optic Character

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

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Corundum and Euclase Transparency

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