Iolite 3x4mm Rondelle Faceted A Grade - 15-16 Inch India Boulder Opal is a golden-brown

Boulder Opal is a golden-brown to dark brown stone

Like other Agates

turquoise and white stone that can have streaks and patterns of white

These strands were cut into beads with some of the material the Chalcedony was mined out of remaining

Iolite 3x4mm Rondelle Faceted A Grade - 15-16 Inch India 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.