Sonolite and Alexandrite Optical Properties

Sonolite

Alexandrite

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1 Optical Properties

1.1 Luster

Vitreous

1.2 Pleochroism

Not Available

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

TransparentAnthony et al, Handbook of mineralogy (2001)

Transparent, Transparent to nearly opaque

1.5 Refractive Index

1.763-1.7931.739-1.770

1 3.25

1.6 Optic Character

Not Available

Biaxial/+

1.7 Crystal System

Not Available

Orthorhombic

1.8 Birefringence

Not Available0.007-0.010

0 0.296

1.9 Clarity

TransparentAnthony et al

Transparent

Sonolite and Alexandrite Optic Character

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

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Sonolite and Alexandrite Transparency

Similar to their colors, Sonolite and Alexandrite 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, Sonolite is Handbook of mineralogy (2001) and TransparentAnthony et al while Sonolite is Handbook of mineralogy (2001) and TransparentAnthony et al in appearance.