AN EMERALD SINGLE-STONE RING, BY GÜBELIN
The square-cut emerald weighing 4.81 carats to the triangular-cut diamond shoulders and plain hoop
With maker's mark for Gübelin
Accompanied by report No. 982592 dated 13 March 2007 from the Precious Stone Laboratory, London, stating that the emerald is of Colombian origin, with evidence of moderate clarity enhancement