Vesuvianite and Tourmaline Optical Properties

Vesuvianite

Tourmaline

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1 Optical Properties

1.1 Luster

Vitreous, Resinous

Vitreous

1.2 Pleochroism

slight in colored varieties

typically moderate to strong

1.3 Dispersion

NA0.02

0.007 1

1.4 Transparency

Not Available

Transparent, Translucent, Transparent to opaque

1.5 Refractive Index

1.703-1.7521.614-1.666

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

tetragonal

Trigonal

1.8 Birefringence

0.004-0.0060.014-0.040

0 0.296

1.9 Clarity

Not Available

Transparent

Vesuvianite and Tourmaline Optic Character

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

Similar to their colors, Vesuvianite and Tourmaline 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, Vesuvianite is Not Available while Vesuvianite is Not Available in appearance.