CA. 600 AD; GOLD BYZANTINE RING WITH GLASS COBOCHON. In order to confirm its authenticity, this piece has undergone X-Ray Fluorescence analysis by an independent Belgian Laboratory. The samples collected show the chemical composition to reflect the typical metal contents of the described period, whilst also showing no modern trace elements in the patina. Good condition; wearable; Size: D: 18.8mm / US: 8 7/8 / UK: R 1/2; 7.9g; Provenance: Property of a professional Ancient art and jewelry expert; previously with a London gallery; initially from a private British collection formed in the 1980s.