Tourmaline and Painite Optical Properties

Tourmaline

Painite

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1 Optical Properties

1.1 Luster

Vitreous

Not Available

1.2 Pleochroism

typically moderate to strong

Strong dichroism: yellow-brown red to brown-violet (pinkish samples: nearly colorless pale orangy-pink)Herve Nicolas Lazzarelli

1.3 Dispersion

Albite Optical ..

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0.02

Rank: 22 (Overall)▶

Not Available

Rank: N/A (Overall)▶

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Fluorite Optical Properties

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0.044 (Anglesite Opt..)

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1.4 Transparency

Transparent, Translucent, Transparent to opaque

Gems

1.5 Refractive Index

1.614-1.666

1.787-1.816

1.6 Optic Character

Not Available

1.7 Crystal System

Trigonal

Not Available

1.8 Birefringence

0.014-0.040

0.029

1.9 Clarity

Transparent

Gems

Tourmaline and Painite Optic Character

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

Compare Semi Precious Gemstones

Tourmaline Vs Citrine

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Tourmaline Vs Beryl

Tourmaline and Painite Transparency

Similar to their colors, Tourmaline and Painite 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, Tourmaline is Translucent, Transparent and Transparent to opaque while Tourmaline is Translucent, Transparent and Transparent to opaque in appearance.

Semi Precious

Turquoise

Peridot

Lehsunia

Alexandrite

Amethyst

Beryl