This jewelry set features black-plated hematite natural stone beads. The small to large (4mm-8mm) graduated increments lend a refined look. - The necklace is adjustable 16-19 inches using its silver-plated lobster clasp and extender chain. - The bracelet is adjustable 7-9 inches using its silver-plated lobster clasp and extender chain. - The earrings are on silver-plated ball post ear wires.