Prasiolite and Euclase Optical Properties

Prasiolite

Euclase

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1 Optical Properties

1.1 Luster

Vitreous

1.2 Pleochroism

Very weak: light green pale greenWalter Schumann

Weak: colorless-(greenish) yellow

1.3 Dispersion

0.010.02

0.007 1

1.4 Transparency

Transparent, Translucent

Gemmological Tables (2004) More from other references

1.5 Refractive Index

1.544-1.5531.650-1.677

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

0.0090.019-0.025

0 0.296

1.9 Clarity

Transparent

TransparentUlrich Henn and Claudio C. Milisenda

Prasiolite and Euclase Optic Character

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

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