Spessartine and Euclase Optical Properties

Spessartine

Euclase

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1 Optical Properties

1.1 Luster

Vitreous

1.2 Pleochroism

Not Available

Weak: colorless-(greenish) yellow

1.3 Dispersion

0.030.02

0.007 1

1.4 Transparency

Gemmological Tables (2004) More from other references

1.5 Refractive Index

1.789-1.8201.650-1.677

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Isometric

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

1.8 Birefringence

0.0270.019-0.025

0 0.296

1.9 Clarity

TransparentUlrich Henn and Claudio C. Milisenda

Spessartine and Euclase Optic Character

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

Similar to their colors, Spessartine 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, Spessartine is Gemmological Tables (2004) More from other references while Spessartine is Gemmological Tables (2004) More from other references in appearance.