The Kassites also maintained the Indo-Iranian Aryan tradition of being traders in lapis lazuli and gold (see Aryan Trade). The only known ancient source of lapis lazuli was Badakshan in present day Afghanistan and in the heart of ancient Aryan lands. The Zagros mountains had ore deposits of iron and copper which the Kassites extracted and used to manufacture vehicles such as chariots and carts. Along with horses, they exported the chariots in exchange for other raw materials. Amongst the nations with which the Kassite kings established trade and diplomatic relations were Assyria, Egypt, Elam, and the Hittite Hatti. Kassite merchants established themselves in the major cities in the region. Kassite weights and seals, the measuring and identifying and tools of commerce, have been found as far afield as Thebes (Greece), southern Armenia, and even in a shipwreck off the southern coast of Turkey.