Two birthstones are available for August birthdays: Peridot and Sardonyx.
Peridot is a gemstone that forms deep inside the Earth and brought to the surface by volcanoes. Today, most of the Peridot supply comes from Arizona; other sources are China, Myanmar, and Pakistan. This gemstone comes in several color variations ranging from yellowish green to brown, but most consumers are attracted to the bright lime greens and olive greens. Peridot, in smaller sizes, often is used in beaded necklaces and bracelets.
Sardonyx is a form of onyx and is recognized by its layers of reddish brown and white banding. Because of its attractive banding, Sardonyx has long been used to fashion cameos (carved raised figures) and intaglios (the reverse of cameos). This gemstone is found throughout the world. The most attractive specimens are found in India, but material also is mined in Czechoslovakia, Brazil, Uruguay, Germany, and in the United States.