BYZANTINE ROCK-CRYSTAL STAMP SEAL DEPICTING ST. GEORGE KILLING THE DRAGON Ca. AD 900 - 1200. A conical rock-crystal stamp seal with a flat octagonal face engraved with an image of St. George on horseback, shown galloping to the left with a spear in his hands. Beneath the horse is the sinuous form of the dragon, its head upturned in confrontation. The upper end is capped with a silver mount terminating in a suspension loop. For similar see: Middle Byzantine (10th-13th century AD) Stamp Seals in Semi-precious Stone, in C. Entwistle, ed., Through a Glass Brightly. Studies in Byzantine and Medieval Art and Archaeology Presented to David Buckton (Exeter, 2003), pp. 114-126. Size: 30mm x 15mm; Weight: 7.7g Provenance: Private UK collection; From an old British collection formed in the 1990s. This piece is accompanied by a report from Striptwist Ltd, a London-based company run by precious metal specialist Dr Jack Ogden. This item has been cleared against the Art Loss Register database and comes with a confirmation letter.