Sapphire and Elbaite Optical Properties

Sapphire

Elbaite

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1 Optical Properties

1.1 Luster

Vitreous, Adamantine, Vitreous, Adamantine

Vitreous

1.2 Pleochroism

Strong

Pale green

1.3 Dispersion

0.020.02

0.007 1

1.4 Transparency

Transparent, Translucent, Transparent to opaque

Transparent

1.5 Refractive Index

1.762-1.7881.614-1.666

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Trigonal

1.8 Birefringence

0.008-0.0090.014-0.032

0 0.296

1.9 Clarity

Transparent

Sapphire and Elbaite Optic Character

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

Similar to their colors, Sapphire and Elbaite 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, Sapphire is Translucent, Transparent and Transparent to opaque while Sapphire is Translucent, Transparent and Transparent to opaque in appearance.