August's Birthstone Block by MJ Kinman is Peridot.
Peridot represents warmth and well-being, and is mentally stimulating and physically regenerating. It offers inner radiance and opens the mind to new levels of awareness and growth, helping one to recognize destiny and spiritual purpose.
Associated with the sun, Peridot has historically been prized for its power to drive away the forces of darkness. Ancient Civilizations used it as a charm against sorcery and magic, evil spirits, night terrors, and madness--especially when set in gold or strung on donkey hair and tied around the left arm.
According to legend, ancient Egyptians mined a beautiful green gem on an island now known as Zabargad. The island was infested with snakes, making mining unpleasant, until an powerful pharaoh drove them into the sea. In more modern times, the largest Peridot on record, a 310 carat stone, was found there!