Chalcedony. A Semi-treasured gemstone named following the nearby city of Chalcedon, and is particularly marketed in lots of Istanbul's large number of jewellery stores. Through the Bosphorus to east is Asian Aspect, centred round the historical districts of Kadıköy and Üsküdar, and maybe greatest symbolized by Maiden’s Tower, located at https://istanbul-work80234.oneworldwiki.com/6976176/detailed_notes_on_istanbul_wordpress