Riebeckite and Titanite Sphene Optical Properties

Riebeckite

Titanite Sphene

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1 Optical Properties

1.1 Luster

Vitreous, Silky

Not Available

1.2 Pleochroism

X = blue

Green stones strong trichroism: typically colorless greenish yellow brownish to yellow;

1.3 Dispersion

NA0.05

0.007 1

1.4 Transparency

Not Available

Transparent, Translucent

1.5 Refractive Index

1.680-1.6981.843-2.110

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

monoclinic

Not Available

1.8 Birefringence

0.005-0.0080.100-0.192

0 0.296

1.9 Clarity

Not Available

Transparent

Riebeckite and Titanite Sphene Optic Character

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

Similar to their colors, Riebeckite and Titanite Sphene 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, Riebeckite is Not Available while Riebeckite is Not Available in appearance.