The August birthstone is the peridot, a gemstone that is known for its bright green color. It is believed to bring good luck and protection to its wearer. Peridot is formed deep within the Earth's mantle and brought to the surface by volcanoes. It is found in many places around the world, including Hawaii, Arizona, Norway, and Pakistan. Peridot is a relatively hard gemstone, measuring 6.5 to 7 on the Mohs scale. It is often used in jewelry, such as rings, earrings, and necklaces. It is also believed to have healing properties, such as helping to reduce stress and anxiety.