Sodalite and Amblygonite Optical Properties

Sodalite

Amblygonite

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1 Optical Properties

1.1 Luster

Greasy

Vitreous, Pearly

1.2 Pleochroism

AbsentWalter Schumann

weak to none

1.3 Dispersion

0.020.01

0.007 1

1.4 Transparency

Transparent, Translucent, Opaque

Gemmological Tables (2004) More from other references

1.5 Refractive Index

1.478-1.4881.578-1.646

1 3.25

1.6 Optic Character

Not Available

Biaxial/+

1.7 Crystal System

cubic

Triclinic

1.8 Birefringence

Not Available0.020-0.030

0 0.296

1.9 Clarity

Transparent

TransparentUlrich Henn and Claudio C. Milisenda

Sodalite and Amblygonite Optic Character

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

Similar to their colors, Sodalite and Amblygonite 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, Sodalite is Opaque, Translucent and Transparent while Sodalite is Opaque, Translucent and Transparent in appearance.