Peridot

Green or yellow green crystals, emitting a warm friendly energy, furthers the understanding of changes that are going on in ones life. Cleanses and stimulates the heart and solar plexus chakras, and helps regulates all of the cycles in life. Can be used as a pick me up, strengthening and re-energising the body.
It is also a stone of protection providing a shield around the body, as such will need to be removed for a while when balancing or cleansing chakras. A highly valued stone in healing circles, as worn in many a high priests breastplate because of it’s significance. Used in healing involving the heart, lungs and intestinal conditions, as well as some eyesight issues. A lovely stone to have around you.

Peridot (pronounced "pair-uh-doe") is the gem quality variety of forsteritic olivine.  The name of the gemstone is believed to come from either the Arabic word faridat meaning "gem" or the French word peritot meaning "unclear." Peridot is one of the few gemstones that comes in only one color. The depth of green depends on how much iron is contained in the crystal structure, and varies from yellow-green to olive to brownish green. Peridot is also often referred to as "poor man's emerald". Olivine is a very abundant mineral, but gem-quality peridot is rather rare. Peridot crystals have been collected from iron-nickel meteorites.

Olivine is a common mineral in mafic and ultramafic rocks, and is often found in lavas and in peridotite xenoliths of the mantle that lavas carry to the surface; however, gem-quality peridot only occurs in a fraction of these settings. Peridot is mined in North Carolina, Arizona, Hawaii, Nevada, and New Mexico, in the US; and in Australia, Brazil, China, Kenya, Mexico, Myanmar (Burma), Norway, Pakistan, South Africa, Sri Lanka, and Tanzania. Peridot of high quality is commercially mined in the eastern lava fields of Saudi Arabia. The largest cut peridot is a 310 carat (62 g) specimen in the Smithsonian Museum in Washington, D.C.. A special variety of a peridot from Pakistan is known as "Kashmir" peridot. Due to the large size of the rough stones found there, cutters have successfully created faceted stones of over 100 carats (20 g) from the rough gems of this area.

It is the birthstone for the month of August. According to folklore, the peridot will bring its wearer success, peace, and good luck. Peridot has been found in Egyptian jewelery from the early second millennium BCE and was mined from the volcanic island of Zebirget, or St. Johns Island, in the Red Sea.