The Navajo Pearls are made of sterling silver. The beads are buffed to create a bead that is extremely smooth. They have been antiqued with a dark oxidation and polished to a satin finish. This necklace has beads that vary from 4mm,5mm & 6mm .They are very comfortable to wear. Each necklace is finished off with a hook and eye clasp. They are terrific as a chain for all your pendants while being the perfect necklace for casual or evening.