Vintage Cobalt Blue Transparent Glass Round Bead Necklace 14in 10mm King Bead

The macro photos reveal internal air bubbles, subtle swirling, and surface wear consistent with old hand-made glass rather than modern production. The vivid sapphire-cobalt blue color and the round form at this size are characteristic of what collectors call King beads, large transparent glass rounds used in the West African trade and produced primarily in Bohemia and Venice from the late 1800s into the early 1900s.