Multi-strand Beaded Stone-like Necklace Solid White, Black & White Marble-Look

This unique necklace is beautiful! Three strands of beads, two white and one that’s black and white with a marble look. Very sleek and chic. Looks heavier than it is. I’m not 100% sure what the beads are made of. Not stone or ceramic, but not plasticy either. Super adjustable for length.