Hardystonite and Watermelon Tourmaline Optical Properties

Hardystonite

Watermelon Tourmaline

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1 Optical Properties

1.1 Luster

Vitreous, Resinous, Greasy

Vitreous

1.2 Pleochroism

Not Available

1.3 Dispersion

NA0.02

0.007 1

1.4 Transparency

Handbook of mineralogy (2001)

TransparentGemdat.org, Management Team (2012)

1.5 Refractive Index

1.6721.614-1.666

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

tetragonal

Not Available

1.8 Birefringence

Not Available0.014-0.040

0 0.296

1.9 Clarity

Handbook of mineralogy (2001)

TransparentGemdat.org

Hardystonite and Watermelon Tourmaline Optic Character

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

Similar to their colors, Hardystonite 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, Hardystonite is Handbook of mineralogy (2001) while Hardystonite is Handbook of mineralogy (2001) in appearance.