Rubellite and Watermelon Tourmaline Optical Properties

Rubellite

Watermelon Tourmaline

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1 Optical Properties

1.1 Luster

Not Available

Vitreous

1.2 Pleochroism

Strong: dark red pinkish-redHerve Nicolas Lazzarelli

Not Available

1.3 Dispersion

0.020.02

0.007 1

1.4 Transparency

Transparent, Translucent

TransparentGemdat.org, Management Team (2012)

1.5 Refractive Index

1.614-1.6661.614-1.666

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Not Available

1.8 Birefringence

0.014-0.0400.014-0.040

0 0.296

1.9 Clarity

Transparent

TransparentGemdat.org

Rubellite and Watermelon Tourmaline Optic Character

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

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Rubellite and Watermelon Tourmaline Transparency

Similar to their colors, Rubellite and Watermelon 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, Rubellite is Translucent and Transparent while Rubellite is Translucent and Transparent in appearance.