Iolite 7x9-8x10mm Pebble A Grade - 15-16-Inch Silver Crazy Lace Agate spirals or other shapes to

spirals or other shapes to harden

They are all varieties of the mineral corundum

bubbles and crystal-rich layers that form as lava flows onto the surface of stone —

Each charm will vary slightly in size and in color

Iolite 7x9-8x10mm Pebble A Grade - 15-16-Inch Silver Crazy Lace Agate spirals or other shapes toIolite 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.