Anglo-Saxon jewelry that is multicoloured by reason of being inlaid with garnets, blue and green glass, niello, and white shell-like material. It is of two varieties:
Such decoration is usually seen on disc brooches found in the countries of Kent and Suffolk, being an English style derived from, but an improvement on, Continental prototypes. After comparison with the Sutton Hoo Treasure, it has been established that such pieces were made between AD 550/600 and 700, rather than earlier as formerly believed. The Sutton Hoo brooches of East Anglia have larger garnets and the cloison cells are of much more complicated shapes than such Kentish brooches. A much earlier use of the polychrome style is found in Hellenistic jewelry and Roman jewelry.
From: An Illustrated Dictionary of Jewelry, autor: Harold Newman, publishers: Thames and Hudson