Andesine and Tourmaline Optical Properties

Andesine

Tourmaline

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1 Optical Properties

1.1 Luster

Vitreous

1.2 Pleochroism

colorless.

typically moderate to strong

1.3 Dispersion

0.700.02

0.007 1

1.4 Transparency

Transparent, Translucent, Transparent to translucent

Transparent, Translucent, Transparent to opaque

1.5 Refractive Index

1.543-1.5641.614-1.666

1 3.25

1.6 Optic Character

Biaxial/+

Not Available

1.7 Crystal System

Triclinic

Trigonal

1.8 Birefringence

0.007-0.0110.014-0.040

0 0.296

1.9 Clarity

Transparent

Andesine and Tourmaline Optic Character

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

Similar to their colors, Andesine and Tourmaline 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.