Chalcedony. A Semi-valuable gemstone named after the close by town of Chalcedon, and it is sold in lots of Istanbul's multitude of jewellery retailers. Taxis that hold out around a bus station are frequently a vacationer trap. They begin the meter but demand you twenty TL at the very least. https://istanbul-wp57899.wikienlightenment.com/7920138/detailed_notes_on_istanbul_wordpress