August birthstone rings feature the peridot, a lovely pale green gem in a color not seen in many other natural gems, that is simply stunning in these peridot birth stone rings. The August birth stone is considered calming and thought to promote romance. Another significance assigned to August birth stones rings is purity. A birthstone eternity ring is striking and unique, which is nothing less than those born in the hottest month-- particularly under the fiery sign of Leo-- would accept.