1st-4th century AD and later. A group of four turquoise and turquoise-coloured bead necklace strings composed of annular and barrel-shaped beads, three with central drop of carnelian and rock crystal beads, one with central drop of carnelian bead and shell pendant. 29 grams total, 40cm average (15 3/4"). The Signo collection, the property of a West London businessman, formed in the late 1980s-early 1990s. [4]