Riebeckite and Staurolite Optical Properties

Riebeckite

Staurolite

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1 Optical Properties

1.1 Luster

Vitreous, Silky

Resinous

1.2 Pleochroism

X = blue

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

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Not Available

Blue Chart Gem Identification (2010) More from other references

1.5 Refractive Index

1.680-1.6981.736-1.762

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

monoclinic

1.8 Birefringence

0.005-0.0080.009-0.015

0 0.296

1.9 Clarity

Not Available

Blue Chart Gem Identification (2010) More from other references

Riebeckite and Staurolite Optic Character

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

Compare Blue Gemstones

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Riebeckite and Staurolite Transparency

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