Chalcedony. A semi-important gemstone named after the close by town of Chalcedon, and it is sold in many of Istanbul's large number of jewellery stores. A frequent scam, often in lesser inns (but it may also happen in many different other contexts), should be to quote price ranges in Lira https://juliusxkveq.nico-wiki.com/1675477/how_much_you_need_to_expect_you_ll_pay_for_a_good_istanbul_work