Ark Angel Alchemy 22ct. London Blue Topaz Heart Pendant 18" Chain Included The pendant is 30mm in length by 19mm in width. Weighing 8 grams and 44 ct.t.w. The large, gorgeous, blue topaz, heart shaped stone measures 15mm x 16mm.* Weighing 22 carats!* Handmade, Polished Finish, Excellent Quality, Meticulous Detail. Free Diamond Cut 18" Snake Chain with Purchase and Free, Silver Gift Box.