Hurlbutite and Erythrite Optical Properties

Hurlbutite

Erythrite

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1 Optical Properties

1.1 Luster

Vitreous

Subadamantine, Pearly

1.2 Pleochroism

Not Available

Visible: X = pale pinkish to pale rose; Y = pale violet to pale violet-rose; Z = deep red

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Transparent

Not Available

1.5 Refractive Index

1.595-1.6041.626-1.629

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Monoclinic Prismatic H-M Symbol (2/m) Space Group: P 21/a

monoclinic

1.8 Birefringence

0.009Not Available

0 0.296

1.9 Clarity

Transparent

Not Available

Hurlbutite and Erythrite Optic Character

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

Similar to their colors, Hurlbutite and Erythrite 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, Hurlbutite is Transparent while Hurlbutite is Transparent in appearance.