Chalcedony. A semi-cherished gemstone named following the nearby town of Chalcedon, and is also bought in most of Istanbul's large number of jewellery stores. Presently, most metro stations don't have a staffed ticket booth, so you will have to get your Istanbulkart from your yellow ticket machines. By tram[edit] Also https://is-wordpress-is-free35678.blogolenta.com/34051479/top-istanbul-work-secrets