Idocrase and Euclase Optical Properties

Idocrase

Euclase

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1 Optical Properties

1.1 Luster

Not Available

Vitreous

1.2 Pleochroism

Not Available

Weak: colorless-(greenish) yellow

1.3 Dispersion

NA0.02

0.007 1

1.4 Transparency

Not Available

Gemmological Tables (2004) More from other references

1.5 Refractive Index

1.67-1.761.650-1.677

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

tetragonal

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

1.8 Birefringence

Not Available0.019-0.025

0 0.296

1.9 Clarity

Color grading system

TransparentUlrich Henn and Claudio C. Milisenda

Idocrase and Euclase Optic Character

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

Similar to their colors, Idocrase 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, Idocrase is Not Available while Idocrase is Not Available in appearance.