Alexandrite and Apache Tear Optical Properties

Alexandrite

Apache Tear

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1 Optical Properties

1.1 Luster

Vitreous

Not Available

1.2 Pleochroism

Not Available

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Transparent, Transparent to nearly opaque

Not Available

1.5 Refractive Index

1.739-1.770Not Available

1 3.25

1.6 Optic Character

Biaxial/+

Not Available

1.7 Crystal System

Orthorhombic

Amorphous

1.8 Birefringence

0.007-0.010Not Available

0 0.296

1.9 Clarity

Transparent

Not Available

Alexandrite and Apache Tear Optic Character

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

Similar to their colors, Alexandrite and Apache Tear 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, Alexandrite is Transparent and Transparent to nearly opaque while Alexandrite is Transparent and Transparent to nearly opaque in appearance.