Iolite with Flash 6mm Round - 15-16 Inch R0712 It is transparent or translucent

It is transparent or translucent

all organic parts are replaced by minerals

Blood Quartz is a clear to milky to white silicon dioxide mineral

orange and yellow colors in which it occurs

Iolite with Flash 6mm Round - 15-16 Inch R0712 It is transparent or translucentIolite 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.