Faustite and Sinhalite Optical Properties

Faustite

Sinhalite

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1 Optical Properties

1.1 Luster

Waxy

Not Available

1.2 Pleochroism

Not Available

Trichroism: green light brown dark brownHerve Nicolas Lazzarelli

1.3 Dispersion

NA0.02

0.007 1

1.4 Transparency

Translucent

Gemmological Tables (2004) More from other references

1.5 Refractive Index

1.6121.665-1.712

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Triclinic Pinacoidal H-M Symbol ( 1) Space Group: P1

Orthorhombic

1.8 Birefringence

Not Available0.036-0.042

0 0.296

1.9 Clarity

Translucent

TransparentUlrich Henn and Claudio C. Milisenda

Faustite and Sinhalite Optic Character

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

Similar to their colors, Faustite 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, Faustite is Translucent while Faustite is Translucent in appearance.