Vesuvianite and Amblygonite Optical Properties

Vesuvianite

Amblygonite

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1 Optical Properties

1.1 Luster

Vitreous, Resinous

Vitreous, Pearly

1.2 Pleochroism

slight in colored varieties

weak to none

1.3 Dispersion

NA0.01

0.007 1

1.4 Transparency

Not Available

Gemmological Tables (2004) More from other references

1.5 Refractive Index

1.703-1.7521.578-1.646

1 3.25

1.6 Optic Character

Not Available

Biaxial/+

1.7 Crystal System

tetragonal

Triclinic

1.8 Birefringence

0.004-0.0060.020-0.030

0 0.296

1.9 Clarity

Not Available

TransparentUlrich Henn and Claudio C. Milisenda

Vesuvianite and Amblygonite Optic Character

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

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