Cf. Philip L. Kohl, "Carved Chlorite Vessels", Expedition 1975, pp. 18-30, in which the author describes the quarries of Kerman and the recently discovered manufacturing centre of these vessels at Tepe Yahya. Vases with a similar guilloched motif have been found only at Tepe Yahya and Mari, but other chlorite vessels have been found at Susa, Tello, Sippar, Kish, Fara, Ur and Mohenjodaro