Dioptase and Sinhalite Optical Properties

Dioptase

Sinhalite

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1 Optical Properties

1.1 Luster

Vitreous

Not Available

1.2 Pleochroism

Weak; dark emerald green

Trichroism: green light brown dark brownHerve Nicolas Lazzarelli

1.3 Dispersion

0.040.02

0.007 1

1.4 Transparency

TranslucentHerve Nicolas Lazzarelli

Gemmological Tables (2004) More from other references

1.5 Refractive Index

1.644-1.7201.665-1.712

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Trigonal

Orthorhombic

1.8 Birefringence

0.051-0.0530.036-0.042

0 0.296

1.9 Clarity

TranslucentHerve Nicolas Lazzarelli

TransparentUlrich Henn and Claudio C. Milisenda

Dioptase and Sinhalite Optic Character

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

Similar to their colors, Dioptase 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, Dioptase is TranslucentHerve Nicolas Lazzarelli while Dioptase is TranslucentHerve Nicolas Lazzarelli in appearance.