This striking necklace appears to be a tennis chain or tennis necklace, characterized by a continuous, symmetrical line of individually set stones. The specific design is likely a flexible snake or herringbone style, where the links form a continuous, fluid, segmented line.

It is described as a Moissanite Diamond Chain, meaning the brilliant, colorless stones set throughout the piece are Moissanite, a gemstone popular for its high brilliance and durability, often used as a diamond alternative. The piece is fully paved in these stones, giving it a high-end, iced-out look. The clasp is visible at the back, and the way the chain is styled suggests it can be worn as a standard necklace or perhaps draped in a lariat/Y-necklace fashion.