Gem Grade Onyx Beads Necklace | Indian jewelry in USAGem grade onyx beads 3 lines necklace length 24 and comes with adjustable Dori gem grade onyx beads 3 line necklace typically features onyx beads, a beautiful and polished black gemstone known for its smooth texture and striking appearance. These necklaces often consist of three strands of onyx beads that are carefully strung together to create a layered, elegant design. The beads may vary in size and shape, ranging from small round beads to larger