Polished stone bowl 

Caption

Import restricted since 1997.

Section III.B of the Designated List.

IV. PRE-COLUMBIAN LITHICS
B. Polished stone
Bowl--Vessels of dark colored-stone, sometimes streaked. They have a highly polished, very smooth surface. Some show external carved decoration. Diameters range from 12 cm--55 cm.
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Example shown is from Ancash.