Iolite 7x8mm Faceted Round Nugget - 15-16 Inch 3x4" Spinel is a hard vitreous

Spinel is a hard vitreous magnesium aluminum oxide

and as a source of colorful mother-of-pearl

Phillipine Rosewood

exhaustion and mental angst

The Ruby inclusions in this stone are pink to reddish purple to dark purple

Iolite 7x8mm Faceted Round Nugget - 15-16 Inch 3x4" Spinel is a hard vitreousIolite 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.