Venetian Aventurine Glass and Onyx Bead Necklace

This is a statement necklace featuring a graduated arrangement of black glass and stone beads. The central focus consists of five large, oval-shaped Venetian-style glass beads. These beads exhibit an 'aventurine' effect, characterized by an internal sparkle created by metallic inclusions, likely copper or gold-leaf flecks, swirled within a translucent dark base. Interspersed between these focal beads are flat, disc-shaped black spacers and polished silver-tone metal rondelles, which provide a rhythmic contrast. Moving toward the clasp, the necklace transitions into uniform, smaller round black beads, possibly onyx or opaque black glass. The piece is approximately 18 to 20 inches in length, suggesting a princess necklace fit. While no specific maker's mark is visible in the provided view, the style is reminiscent of mid-to-late 20th-century costume jewelry, particularly Italian-made glass artistry from the 1960s or 70s. The condition appears fair to good; the surface of the larger beads shows a glossy finish with no readily apparent chips or cracks, though light surface scuffing is expected with age. The metal spacers show minimal signs of oxidation or plating wear. The craftsmanship is evident in the symmetrical layout and the use of high-interest art glass beads as the centerpiece.