Hurlbutite and Fayalite Optical Properties

Hurlbutite

Fayalite

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1 Optical Properties

1.1 Luster

Vitreous

Vitreous, Resinous

1.2 Pleochroism

Not Available

Faint

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Transparent

TransparentAnthony et al, Handbook of mineralogy (2001)

1.5 Refractive Index

1.595-1.6041.827-1.879

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

Orthorhombic

1.8 Birefringence

0.0090.042-0.051

0 0.296

1.9 Clarity

Transparent

TransparentAnthony et al

Hurlbutite and Fayalite Optic Character

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

Similar to their colors, Hurlbutite and Fayalite 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.