Hematite Silver Plated 4mm Faceted Rondelle - 15-16 inch 15-16 inch and much of the black

and much of the black Onyx on the market has been artificially colored

or color-enhanced

Blue Chalcedony is a naturally occurring soft blue translucent stone

or some degree of pink in between

Hematite Silver Plated 4mm Faceted Rondelle - 15-16 inch 15-16 inch and much of the blackHematite is an iron oxide and one of the few gemstones with a metallic luster. When tumbled it can have the look of polished steel. Hematite is black to steel gray or silver gray, as well as brown to reddish brown or red in color. Its name is derived from the Greek word for blood, haima, owing to its red appearance when sliced thinly or powdered.