Chalcedony. A semi-treasured gemstone named once the close by city of Chalcedon, which is sold in most of Istanbul's multitude of jewellery retailers. Purchasing an Istanbulkart is a good suggestion if you are in Istanbul for a lot more than each day or two, and plan to use public transportation. https://istanbul-personal-portfol13456.idblogmaker.com/36000791/detailed-notes-on-istanbul-wordpress