All of the following are synthetic sharpening stone except:
(A) Silicon carbide (B) Alumina (C) Arkansas (D) Diamond
(C) Stone type can come in natural or synthetic form:

Natural-Arkansas (preferred)
Synthetic:
	
India stone
Ceramic stone
Composition stone
Diamond
Alumina
Silicon carbide



Nisha Garg, Amit Garg. Textbook of Operative Dentistry.  Edition 3. Page:97