Pearl and Williamsite Optical Properties

Pearl

Williamsite

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1 Optical Properties

1.1 Luster

Pearly

Waxy, Silky, Resinous, Greasy

1.2 Pleochroism

AbsentWalter Schumann

Not Available

1.3 Dispersion

NoneNA

0.007 1

1.4 Transparency

Translucent, Opaque

TranslucentHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)

1.5 Refractive Index

1.52-1.661.530-1.575

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Orthorhombic

Not Available

1.8 Birefringence

0.156Not Available

0 0.296

1.9 Clarity

Translucent

TranslucentHerve Nicolas Lazzarelli

Pearl and Williamsite Optic Character

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

Compare Blue Gemstones

Pearl Vs Precious Opal

Pearl Vs Prase Opal

Pearl Vs Prase

Pearl and Williamsite Transparency

Similar to their colors, Pearl 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, Pearl is Opaque and Translucent while Pearl is Opaque and Translucent in appearance.