Andesine and Tantalite Optical Properties

Andesine

Tantalite

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1 Optical Properties

1.1 Luster

Vitreous

Resinous

1.2 Pleochroism

colorless.

Not Available

1.3 Dispersion

0.70NA

0.007 1

1.4 Transparency

Transparent, Translucent, Transparent to translucent

TransparentWalter Schumann, Gemstones of the world (2001) More from other references

1.5 Refractive Index

1.543-1.5642.190-2.457

1 3.25

1.6 Optic Character

Biaxial/+

Not Available

1.7 Crystal System

Triclinic

Orthorhombic

1.8 Birefringence

0.007-0.0110.083

0 0.296

1.9 Clarity

Transparent

TransparentWalter Schumann

Andesine and Tantalite Optic Character

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

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Andesine and Tantalite Transparency

Similar to their colors, Andesine and Tantalite 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, Andesine is Translucent, Transparent and Transparent to translucent while Andesine is Translucent, Transparent and Transparent to translucent in appearance.