Brookite and Zoisite Optical Properties

Brookite

Zoisite

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1 Optical Properties

1.1 Luster

Adamantine

Vitreous

1.2 Pleochroism

Very weak

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

1.3 Dispersion

NA0.02

0.007 1

1.4 Transparency

Gemmological Tables (2004) More from other references

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

1.5 Refractive Index

2.583-2.7411.685-1.707

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Orthorhombic

1.8 Birefringence

0.1170.006-0.018

0 0.296

1.9 Clarity

Gemmological Tables (2004) More from other references

Transparent

Brookite and Zoisite Optic Character

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

Similar to their colors, Brookite and Zoisite 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, Brookite is Gemmological Tables (2004) More from other references while Brookite is Gemmological Tables (2004) More from other references in appearance.