Iolite 7x9-8x10mm Pebble A Grade - 15-16-Inch tucson2026-PEBCHP1 a mineral of the Quartz

a mineral of the Quartz family

Turquoise is one of the oldest known stones in human history

They are all silicate minerals

On cut or polished stones

It forms over long periods as mineral-rich water moves through aluminous rock

Iolite 7x9-8x10mm Pebble A Grade - 15-16-Inch tucson2026-PEBCHP1 a mineral of the QuartzIolite 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.