Hurlbutite and Staurolite Optical Properties

Hurlbutite

Staurolite

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1 Optical Properties

1.1 Luster

Vitreous

Resinous

1.2 Pleochroism

Not Available

X = colorless; Y = pale yellow; Z = golden yellow

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Transparent

Blue Chart Gem Identification (2010) More from other references

1.5 Refractive Index

1.595-1.6041.736-1.762

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

0.0090.009-0.015

0 0.296

1.9 Clarity

Transparent

Blue Chart Gem Identification (2010) More from other references

Hurlbutite and Staurolite Optic Character

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

Similar to their colors, Hurlbutite and Staurolite 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.