1x Vintage Venetian Turquoise Sommerso Glass Beads 9mm. Beautiful lampworked beads with swirls of turquoise blue opaque glass and aventurine within a clear glass outer. Sommerso is the name of the technique that submerses different colours beneath clear glass. Aventurine is glass with copper particles within it for sparkle. Each bead is unique and as befits their handmade nature sizes and shapes will vary slightly. 9mm is the average length hole-to-hole. We estimate that these beads were made during the 1950s or 1960s.