Iolite 7x8mm Faceted Round Nugget - 15-16 Inch New Septemeber 2022 Red Botswana Agate displays highly

Red Botswana Agate displays highly defined parallel banding

Wesley a former chief chemist with the Mount Lyell Mining and Railway Company

madre xacao or madre de cacao

These inclusions are chromite

and chatoyancy

Iolite 7x8mm Faceted Round Nugget - 15-16 Inch New Septemeber 2022 Red Botswana Agate displays highlyIolite 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.