A gleaming and high-grade Fatimid dinar of Al Amin - the inspiration for the later Crusader Bezants made by the European knights who occupied Acre and Jerusalem a half-century later (but their copies were struck in lower purity gold than this, the real thing).
 
NGC certification # 2932554-002
 
Pin-point date-able to 1122-23 AD based on the Islamic date that is part of the legends on the coin, AH 516.