A mid 20th century 18ct gold Colombian emerald and diamond three-stone ring. The rectangular-shape emerald, weighing 0.81ct, with old-cut diamond sides and single-cut diamond line shoulders. With report 77106-43, dated 22nd June 2017, from GCS stating Colombia, minor enhancement. Estimated total diamond weight 1.15cts, I-J colour, SI2-P1 clarity. Hallmarks for Birmingham, 1965. Ring size M1/2. Weight 4gms.