A gem peridot crystal from the classic locale for gem forsterite - St. John's 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 Mediterranean. This is a superb, historic gem crystal and a fine thumbnail as well.