A gem peridot crystal from the classic locale for gem forsterite - St. Johns Island in the Red Sea off Egypt. This ancient locality was mined for peridot or "night emerald" as it was called, in the time of the Egyptian pharaohs. This is a locale now long gone and to my knowledge not collected from after the early 1900s at latest. In fact, the site is now under the Red Sea. This is a superb, historic gem crystal and a fine thumbnail as well.