This is a very beautiful piece that seems both simple and intricate. It can be worn as a unique every day necklace but it is a classic Mangalsutra, often worn for weddings.
Mangalsutra literally means "an auspicious thread" which is knotted around the bride’s neck. It is usually a necklace with black beads strung from a black or yellow thread prepared with turmeric. Sometimes gold, white or red beads are also added to the mangal sutra, depending on regional variation.