Sinhalite and Spinel Optical Properties

Sinhalite

Spinel

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1 Optical Properties

1.1 Luster

Not Available

Vitreous

1.2 Pleochroism

Trichroism: green light brown dark brownHerve Nicolas Lazzarelli

Absent

1.3 Dispersion

0.020.02

0.007 1

1.4 Transparency

Gemmological Tables (2004) More from other references

Transparent, Translucent, Transparent to translucent

1.5 Refractive Index

1.665-1.7121.73

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Orthorhombic

Isometric

1.8 Birefringence

0.036-0.042Not Available

0 0.296

1.9 Clarity

TransparentUlrich Henn and Claudio C. Milisenda

Sinhalite and Spinel Optic Character

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

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