Aventurine and Allanite Optical Properties

Aventurine

Allanite

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1 Optical Properties

1.1 Luster

Vitreous

Not Available

1.2 Pleochroism

AbsentWalter Schumann

Not Available

1.3 Dispersion

NoneNA

0.007 1

1.4 Transparency

Translucent, Opaque . May be translucent when backlit on the edges.

Not Available

1.5 Refractive Index

1.544-1.5531

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Trigonal

Not Available

1.8 Birefringence

0.007-0.0100.013-0.036

0 0.296

1.9 Clarity

Translucent

Not Available

Aventurine and Allanite Optic Character

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

Similar to their colors, Aventurine and Allanite 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, Aventurine is Opaque . May be translucent when backlit on the edges. and Translucent while Aventurine is Opaque . May be translucent when backlit on the edges. and Translucent in appearance.