Turquoise, a popular semi-precious blue-green colored gemstone, was imported by the Harappans from ancient Persia (modern Iran). Along with lapis lazuli from Badakhshan province, these stones were highly valued for ornamental purposes and seal carving. Evidence of long distance trade in precious items is indicated by finds at Bampur in Persia where carnelian beads, jars and goblets typical of the Indus Valley were found in exchange. Commercial transactions were facilitated by a standardized system of weights.
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