A LARGE MARVERED GLASS NECKLACE BEAD Possibly Syria or Egypt, 13th - 14th century Of cylindrical shape, the terminals chamfered and smoothed around a central hollow core, the ground of the body opaque white and decorated with marvered red and blue irregular wavy pattern, 4.2cm x 3.5cm. The same irregular wavy pattern on this large necklace bead can be seen on a pale blue and opaque white glass cup attributed to Egypt or Syria in the 8th - 9th century, now part of the Al-Sabah Collection in the Kuwait National Museum (inv. no. LNS 52 KG) and published in S. Carboni, Glass of the Sultans , New York, 2001, p. 138. This shows how certain designs lingered in the repertoire of the Islamic glass makers throughout the centuries.