Iolite Faceted 10mm Energy Prism - 15-16 Inch 68197 Boulder Opal is a golden-brown

Boulder Opal is a golden-brown to dark brown stone

Moonstone naturally occurs in a broad spectrum of colors

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Sunset Dumortierite has a much brighter palette than regular Dumortierite

Jade has been used for tens of thousands of years

Iolite Faceted 10mm Energy Prism - 15-16 Inch 68197 Boulder Opal is a golden-brownIolite most commonly occurs in shades of blue to gray, violet or indigo. It displays a visual property called pleochroism, which means that it can appear to be different colors as it shifts in the light. According to Norse legend, Viking explorers used thin pieces of Iolite as the worlds first polarizing lens to help them determine the exact location of the sun for navigation.