Anthophyllite and Vesuvianite Idocrase Optical Properties

Anthophyllite

Vesuvianite Idocrase

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1 Optical Properties

1.1 Luster

Vitreous, Pearly

Not Available

1.2 Pleochroism

When Fe-rich

Not Available

1.3 Dispersion

NA0.02

0.007 1

1.4 Transparency

Transparent

1.5 Refractive Index

1.603-1.6901.700-1.725

1 3.25

1.6 Optic Character

Biaxial/+

Uniaxial/-

1.7 Crystal System

Orthorhombic Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P nma

Not Available

1.8 Birefringence

Not Available0.002-0.012

0 0.296

1.9 Clarity

Transparent

Anthophyllite and Vesuvianite Idocrase Optic Character

Anthophyllite and Vesuvianite Idocrase optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Anthophyllite and Vesuvianite Idocrase 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 Anthophyllite and Vesuvianite Idocrase 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. Anthophyllite has Biaxial/+ character.Vesuvianite Idocrase has Uniaxial/- character.

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Anthophyllite and Vesuvianite Idocrase Transparency

Similar to their colors, Anthophyllite and Vesuvianite Idocrase 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, Anthophyllite is Transparent while Anthophyllite is Transparent in appearance.