The artifacts found in the royal tombs of the First Dynasty of Ur indicate that foreign trade was particularly active during this period, with many materials coming from foreign lands, such as Carnelian likely coming from the Indus or Iran, Lapis Lazuli from Afghanistan, silver from Turkey, copper from Oman, and gold from several locations such as Egypt, Nubia, Turkey or Iran. Carnelian beads from the Indus were found in Ur tombs dating to 2600–2450, in an example of Indus-Mesopotamia relations. In particular, carnelian beads with an etched design in white were probably imported from the Indus Valley, and made according to a technique developed by the Harappans. These materials were used in the manufacture of ornamental and ceremonial objects in the workshops of Ur.