Al-Robeya is an old Egyptian gold coin and used for quarter 'zir mahboub ' meaning the beloved gold in Persian . It was minted with the same gold fineness but was equal to quarter its weight . Al-Robeya's price differed throughout the years . In 1238 AH / 1822 AD Al-Robeya was worth 3.5 piastres and by time its value fluctuated to higher or lower