Rubellite and Sinhalite Optical Properties

Rubellite

Sinhalite

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1 Optical Properties

1.1 Luster

Not Available

1.2 Pleochroism

Strong: dark red pinkish-redHerve Nicolas Lazzarelli

Trichroism: green light brown dark brownHerve Nicolas Lazzarelli

1.3 Dispersion

0.020.02

0.007 1

1.4 Transparency

Transparent, Translucent

Gemmological Tables (2004) More from other references

1.5 Refractive Index

1.614-1.6661.665-1.712

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Not Available

Orthorhombic

1.8 Birefringence

0.014-0.0400.036-0.042

0 0.296

1.9 Clarity

Transparent

TransparentUlrich Henn and Claudio C. Milisenda

Rubellite and Sinhalite Optic Character

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

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