Iolite 7x9-8x10mm Pebble A Grade - 15-16-Inch tucson2026-PEBCHP1 also known as Nacre

also known as Nacre

and short prismatic crystals

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

a mineral of the Quartz family

Blue Apatite ranges in color from light teal-blue to bright blue to dark blue-green

Iolite 7x9-8x10mm Pebble A Grade - 15-16-Inch tucson2026-PEBCHP1 also known as NacreIolite 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.