Riebeckite and Hureaulite Optical Properties

Riebeckite

Hureaulite

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1 Optical Properties

1.1 Luster

Vitreous, Silky

Vitreous, Greasy

1.2 Pleochroism

X = blue

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

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Not Available

Transparent

1.5 Refractive Index

1.680-1.6981.647-1.667

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

monoclinic

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

1.8 Birefringence

0.005-0.0080.012

0 0.296

1.9 Clarity

Not Available

Transparent

Riebeckite and Hureaulite Optic Character

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

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Riebeckite and Hureaulite Transparency

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