Peridot is one of the few gems born in the Earth’s mantle — olivine’s gem form, always green, colored by the iron of its own chemistry. From Zabargad’s ancient mines to Arizona and Myanmar’s finest crystals, its oily, sunlit green is unmistakable. Hardness 6.5–7; August’s birthstone.When peridot is in stock at GEMIC Institute it is natural, laboratory-certified and filmed as the exact stone. Join the request list for new arrivals.