Titanite Sphene and Staurolite Optical Properties

Titanite Sphene

Staurolite

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1 Optical Properties

1.1 Luster

Not Available

Resinous

1.2 Pleochroism

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

X = colorless; Y = pale yellow; Z = golden yellow

1.3 Dispersion

0.05NA

0.007 1

1.4 Transparency

Transparent, Translucent

Blue Chart Gem Identification (2010) More from other references

1.5 Refractive Index

1.843-2.1101.736-1.762

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Not Available

monoclinic

1.8 Birefringence

0.100-0.1920.009-0.015

0 0.296

1.9 Clarity

Transparent

Blue Chart Gem Identification (2010) More from other references

Titanite Sphene and Staurolite Optic Character

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

Similar to their colors, Titanite Sphene and Staurolite 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, Titanite Sphene is Translucent and Transparent while Titanite Sphene is Translucent and Transparent in appearance.