A pair of Byzantine gold, pearl, amethyst and rock crystal earrings, circa 7th century AD. Estimation: USD 20,000 - 30,000. Photo Christie's Image Ltd 2015

Each composed of an eight-lobed rosette with a central circular setting set with a foiled-backed cabochon rock crystal, surrounded by a gold wire strung with pearls threaded through eight equidistant loops, with five gold hoops below, each supporting an amethysts or pearl drop, a high arching ear wire at the top. Each: 2 in. (5.1 cm.) high

PROVENANCE: Art Market, London, prior to 1998.

Christie's. Ancient Jewelry sale - Online auctions December 1 -10.