A sapphire and diamond cluster ring, the central oval blue sapphire of estimated weight 20.28 carats, surrounded by sixteen round brilliant cut diamonds of estimated total weight 1.60 carats. 18ct yellow gold. Weight 12.58 grams. Accompanied by GSL Gemstone Authentication Report No. AA49142 dated 29/11/11, stating natural blue sapphire, origin Ceylon, no evidence of heat treatment identified