Phosphosiderite and Titanite Sphene Optical Properties

Phosphosiderite

Titanite Sphene

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1 Optical Properties

1.1 Luster

Vitreous

Not Available

1.2 Pleochroism

Pale rose-red carmine-red colorlessAnthony et al

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

1.3 Dispersion

NA0.05

0.007 1

1.4 Transparency

Transparent

Transparent, Translucent

1.5 Refractive Index

1.692-1.7391.843-2.110

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Not Available

1.8 Birefringence

0.2400.100-0.192

0 0.296

1.9 Clarity

Transparent

Phosphosiderite and Titanite Sphene Optic Character

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

Similar to their colors, Phosphosiderite 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, Phosphosiderite is Transparent while Phosphosiderite is Transparent in appearance.