Chalcedony. A semi-valuable gemstone named after the close by city of Chalcedon, and is particularly bought in most of Istanbul's large number of jewellery shops. Presently, most metro stations don't have a staffed ticket booth, so you will have to obtain your Istanbulkart from the yellow ticket equipment. By tram[edit] https://biyoteknik-m-cadele-deste35789.is-blog.com/43427080/wordpress-installieren-no-further-a-mystery