Titanite Sphene and Amblygonite Optical Properties

Titanite Sphene

Amblygonite

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1 Optical Properties

1.1 Luster

Not Available

Vitreous, Pearly

1.2 Pleochroism

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

weak to none

1.3 Dispersion

0.050.01

0.007 1

1.4 Transparency

Transparent, Translucent

Gemmological Tables (2004) More from other references

1.5 Refractive Index

1.843-2.1101.578-1.646

1 3.25

1.6 Optic Character

Not Available

Biaxial/+

1.7 Crystal System

Not Available

Triclinic

1.8 Birefringence

0.100-0.1920.020-0.030

0 0.296

1.9 Clarity

Transparent

TransparentUlrich Henn and Claudio C. Milisenda

Titanite Sphene and Amblygonite Optic Character

Titanite Sphene and Amblygonite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Titanite Sphene and Amblygonite 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 Amblygonite 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. Amblygonite has Biaxial/+ character.

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Titanite Sphene and Amblygonite Transparency

Similar to their colors, Titanite Sphene and Amblygonite 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.