Beautiful, isn't it? It also happens to be Evanna Lynch's birthstone.
The Peridot, pronounced pear-e-doe, is Evanna’s birthstone, and is a derivative of the stone olivine. It is yellow-green in color, and ranges from olive to brownish-green. It is often referred to as ‘the poor man’s emerald,’ however gem quality Peridot is rather rare. It is also the only precious gem ever found in outer space. Peridot is typically found in volcanic rock, and is found in many parts of the US, Australia, Saudi Arabia, Egypt, and other parts of Africa.

According to folklore, the Peridot brings its wearer success, peace, and good luck, as well as protection, fame, and dignity. It is also said that Peridot is used to help make dreams become reality.