Mixed Dark Lepidocrocite 8mm Large Hole Round - 8 Inch 6-8X10-12mm and those that still exist

and those that still exist today have been passed down for generations

However in some regions

botryoidal

depositing copper and other elements that gradually develop into turquoise

air bubbles or black carbon deposits

Mixed Dark Lepidocrocite 8mm Large Hole Round - 8 Inch 6-8X10-12mm and those that still existAn iron oxide hydroxide mineral, Lepidocrocite forms when iron containing substances rust underwater. It is commonly found in the weathering of primary iron minerals and in iron ore deposits, and can be red to reddish brown. When skillfully cut and polished, those substances add a delicate accent to the otherwise clear gemstone.