Zoisite and Staurolite Optical Properties

Zoisite

Staurolite

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1 Optical Properties

1.1 Luster

Vitreous

Resinous

1.2 Pleochroism

X = pale pink to red-violet; Y = nearly colorless to bright pink or deep blue; Z = pale yellow to yellow-green

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

1.3 Dispersion

0.02NA

0.007 1

1.4 Transparency

Transparent, Translucent, Opaque . May be translucent in thin backlit sections.

Blue Chart Gem Identification (2010) More from other references

1.5 Refractive Index

1.685-1.7071.736-1.762

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Orthorhombic

monoclinic

1.8 Birefringence

0.006-0.0180.009-0.015

0 0.296

1.9 Clarity

Transparent

Blue Chart Gem Identification (2010) More from other references

Zoisite and Staurolite Optic Character

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

Similar to their colors, Zoisite 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, Zoisite is Transparent, Translucent and Opaque . May be translucent in thin backlit sections. while Zoisite is Transparent, Translucent and Opaque . May be translucent in thin backlit sections. in appearance.