[5] The modern American term "rock candy" (referring to brittle large natural sugar crystals) should not be confused with the British term rock (referring to an amorphous and opaque boiled sugar product, initially hard but then chewy at mouth temperature).[7] One of the famed makers of rock candy in the Muslim east is Hafiz Mustafa in 1864 in Istanbul founded during the reign of Sultan Abdulaziz.Many households have rock candy available to marinate meats, add to stir fry, and to prepare food such as yao shan.In the Friesland province of the Netherlands, bits of rock candy are baked in the luxury white bread Fryske Sûkerbôle.[citation needed] In the US, rock candy comes in many colors and flavors, and is slightly hard to find, due to it being considered old-fashioned.