This is an image of a traditional Indian mangalsutra, a sacred necklace worn by married Hindu women. It typically consists of:
Black beads: Believed to ward off evil and protect the marriage.
Gold chain and pendant: This particular design features a gold V-shaped pendant encrusted with white stones (likely diamonds or cubic zirconia) and a small red stone in the center, possibly a ruby or garnet.
Bead spacers: The chain includes decorative gold bead clusters separating the black beads at intervals.