This impressive piece is a Cuban link chain, a signature style known for its thick, interlocking, and often beveled links. This specific chain is a moissanite diamond Cuban chain, meaning the surface of each link is fully covered, or "iced out," with brilliant, closely-set moissanite gems. The "diamond" in the name refers to the diamond-like appearance of the moissanite stones.
The chain also features a prominent custom box clasp which is itself iced out, and appears to have the word "DON" engraved or set into it, possibly in a contrasting metal like rose gold. The combination of the heavy Cuban link, the all-over pave setting of moissanite, and the personalized clasp creates a bold, high-luxury, and statement-making piece of jewelry.