Mixed Dark Lepidocrocite 8mm Large Hole Faceted Round - 8 Inch showroom-new-arrivals Orthoceras was an ancient mollusk

Orthoceras was an ancient mollusk that lived over 370 million years ago

but unlike rubies

orange and rust are due to traces of hematite within the stone

It is named for the Amazon River in Brazil

Mixed Dark Lepidocrocite 8mm Large Hole Faceted Round - 8 Inch showroom-new-arrivals Orthoceras was an ancient molluskAn 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.