Vesuvianite and Iolite Optical Properties

Vesuvianite

Iolite

Add ⊕

1 Optical Properties

1.1 Luster

Vitreous, Resinous

Vitreous

1.2 Pleochroism

slight in colored varieties

Not Available

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Not Available

Transparent, Translucent, Transparent to translucent

1.5 Refractive Index

1.703-1.7521.52-1.56

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

tetragonal

Orthorhombic

1.8 Birefringence

0.004-0.006Not Available

0 0.296

1.9 Clarity

Not Available

Transparent to translucent

Vesuvianite and Iolite Optic Character

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

Vesuvianite Vs Amber

Vesuvianite Vs Alabaster

Vesuvianite Vs Adamite

Vesuvianite and Iolite Transparency

Similar to their colors, Vesuvianite and Iolite 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.