Amblygonite and Zoisite Optical Properties

Amblygonite

Zoisite

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1 Optical Properties

1.1 Luster

Vitreous, Pearly

Vitreous

1.2 Pleochroism

weak to none

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

1.3 Dispersion

0.010.02

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

1.578-1.6461.685-1.707

1 3.25

1.6 Optic Character

Biaxial/+

Not Available

1.7 Crystal System

Triclinic

Orthorhombic

1.8 Birefringence

0.020-0.0300.006-0.018

0 0.296

1.9 Clarity

TransparentUlrich Henn and Claudio C. Milisenda

Transparent

Amblygonite and Zoisite Optic Character

Amblygonite and Zoisite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Amblygonite 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 Amblygonite 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. Amblygonite has Biaxial/+ character.

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Amblygonite and Zoisite Transparency

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