Nuummite and Williamsite Optical Properties

Nuummite

Williamsite

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1 Optical Properties

1.1 Luster

Not Available

Waxy, Silky, Resinous, Greasy

1.2 Pleochroism

Not Available

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Gemmological Tables (2004) More from other references

TranslucentHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)

1.5 Refractive Index

1.635-1.6631.530-1.575

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Not Available

1.8 Birefringence

0.0170-0.230Not Available

0 0.296

1.9 Clarity

Gemmological Tables (2004) More from other references

TranslucentHerve Nicolas Lazzarelli

Nuummite and Williamsite Optic Character

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

Similar to their colors, Nuummite and Williamsite 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, Nuummite is Gemmological Tables (2004) More from other references while Nuummite is Gemmological Tables (2004) More from other references in appearance.