Chalcedony. A Semi-important gemstone named following the nearby town of Chalcedon, and it is marketed in most of Istanbul's large number of jewellery outlets. Nowadays, most metro stations would not have a staffed ticket booth, so you will have to attain your Istanbulkart with the yellow ticket machines. By tram[edit] https://fernandofugra.idblogmaker.com/35809066/top-istanbul-work-secrets