Purpurite and Titanite Sphene Optical Properties

Purpurite

Titanite Sphene

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1 Optical Properties

1.1 Luster

Not Available

1.2 Pleochroism

StrongArthur Thomas

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

1.3 Dispersion

NA0.05

0.007 1

1.4 Transparency

TranslucentWalter Schumann, Gemstones of the world (2001) More from other references

Transparent, Translucent

1.5 Refractive Index

1.85-1.921.843-2.110

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Orthorhombic

Not Available

1.8 Birefringence

0.0700.100-0.192

0 0.296

1.9 Clarity

TranslucentWalter Schumann

Transparent

Purpurite and Titanite Sphene Optic Character

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

Compare Violet Gemstones

Purpurite Vs Sard

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Purpurite and Titanite Sphene Transparency

Similar to their colors, Purpurite 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, Purpurite is Gemstones of the world (2001) More from other references and TranslucentWalter Schumann while Purpurite is Gemstones of the world (2001) More from other references and TranslucentWalter Schumann in appearance.