On this Kot Diji phase steatite button seal from Harappa (H2000-4495 / 9597-01), traces of blue-green glaze can be seen (upper center and left center). Similar seals have been found at other Kot Diji period sites and even in distant Central Asia. >
Kot Diji Phase
Kot Diji Phase (3300-2600 BCE) related sites and objects. This pre-ancient Indus culture is named after the site of Kot Diji on the east bank of the Indus River in Khairpur province, Sindh, and was excavated between 1955 and 1957.