Dioptase and Watermelon Tourmaline Optical Properties

Dioptase

Watermelon Tourmaline

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1 Optical Properties

1.1 Luster

Vitreous

1.2 Pleochroism

Weak; dark emerald green

Not Available

1.3 Dispersion

0.040.02

0.007 1

1.4 Transparency

TranslucentHerve Nicolas Lazzarelli

TransparentGemdat.org, Management Team (2012)

1.5 Refractive Index

1.644-1.7201.614-1.666

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Trigonal

Not Available

1.8 Birefringence

0.051-0.0530.014-0.040

0 0.296

1.9 Clarity

TranslucentHerve Nicolas Lazzarelli

TransparentGemdat.org

Dioptase and Watermelon Tourmaline Optic Character

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

Similar to their colors, Dioptase 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, Dioptase is TranslucentHerve Nicolas Lazzarelli while Dioptase is TranslucentHerve Nicolas Lazzarelli in appearance.