The John Hardy Kali Collection double-cluster black sapphire signed ring is a stunning piece of fine jewelry made of sterling silver. This ring features natural black sapphires set in a cluster style, creating a unique and elegant design. It is handmade in Indonesia by the renowned brand John Hardy, ensuring high quality and craftsmanship. With a ring size of 8.5, this piece is resizable and signed by the artist, making it a special addition to any jewelry collection.