It is a lab emerald ring. The main stone is 7 mm*7 mm octagon cut.weight about 1.25  caratsThe basic metal is sterling silver and plated with rhodium.To change the metal to a solid gold (white/rose) or platinum is also available, please ask for a quotation if you want.You can also go to my shop Home for more elegant rings: https://www.etsy.com/shop/godjewelry?ref=hdr_shop_menu Emerald is May birthstone More emerald rings:https://www.etsy.com/shop/godjewelry?ref=seller-platform-mcnav&section_ Green Octagon Emerald Ring With Bezel Setting, Emerald Octagon Ring With Diamond Cut, Octagon Birthstone Ring For Promise, Green Octagon Birthstone Jewelry, Sterling Silver Asscher Cut Emerald Promise Ring, Green Octagon Emerald Ring With Diamond Cut, Faceted Emerald Promise Ring, Green Emerald-cut Birthstone Ring With Bezel Setting, Octagon White Gold Emerald Ring