"A text from the time of Gudea and Ur-Baba, which is a list of items dedicated to a temple preserves the earliest attestation of ivory (zu-am-si) arriving in Mesopotamia in raw form, listing two pieces of ivory by length and thickness. The evidence of ivory import continues to grow during the succeeding Ur III period. Most of our information comes from Ur, at this time the main gateway for goods entering the region from the south and east [….] in contrast to the pre-Sargonic texts mentioning the import of finished goods in ivory, the craftsmen of Ur were in receipt of sizable quantities of raw ivory, which they then fashioned themselves into objects."
January 1, 1970
https://en.wikiquote.org/wiki/Ivory_trade