Oxidized sterling silver is treated in order to give the piece an antique or vintage appearance.
Malachite is a shining copper ore with swirling islands of rich green color. Used since ancient Egyptian times as pigment for cosmetics, dyes and paints, malachite's primary use today is still ornamental. Popularized in modern times in 19th century Europe, it was worn as protection against the "evil eye." Much of today's fine malachite is mined in the Congo.