Anthophyllite and Hureaulite Optical Properties

Anthophyllite

Hureaulite

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1 Optical Properties

1.1 Luster

Vitreous, Pearly

Vitreous, Greasy

1.2 Pleochroism

When Fe-rich

Colorless yellow to pale rose reddish yellow to reddish brown.Anthony et al

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Transparent

1.5 Refractive Index

1.603-1.6901.647-1.667

1 3.25

1.6 Optic Character

Biaxial/+

Not Available

1.7 Crystal System

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

Monoclinic Prismatic H-M Symbol (2/m) Space Group: C 2/c

1.8 Birefringence

Not Available0.012

0 0.296

1.9 Clarity

Transparent

Anthophyllite and Hureaulite Optic Character

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

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Anthophyllite and Hureaulite Transparency

Similar to their colors, Anthophyllite and Hureaulite 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.