Jasper and Euclase Optical Properties

Jasper

Euclase

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1 Optical Properties

1.1 Luster

Vitreous

1.2 Pleochroism

AbsentWalter Schumann

Weak: colorless-(greenish) yellow

1.3 Dispersion

None0.02

0.007 1

1.4 Transparency

Opaque

Gemmological Tables (2004) More from other references

1.5 Refractive Index

1.5401.650-1.677

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

Not Available0.019-0.025

0 0.296

1.9 Clarity

OpaqueHerve Nicolas Lazzarelli

TransparentUlrich Henn and Claudio C. Milisenda

Jasper and Euclase Optic Character

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

Similar to their colors, Jasper 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, Jasper is Opaque while Jasper is Opaque in appearance.