Peridot is the birthstone for August - so if you still need some ideas for that August born lady for her birthday look no further. These sterling silver stud earrings feature a 2mm round peridot CZ crystal centre in a four prong setting. They weigh 0.4 grams which makes them really lightweight - so lightweight she might not want to take them out! Butterfly backs are supplied with these studs to secure them in place.