Crafted of solid 14 karat yellow gold, the ring's centerpiece is a wonderful bezel set reverse carved natural rock crystal (tested and confirmed that this is rock crystal and not glass!), often called an Essex Crystal. It is carved on the reverse with a sweet white terrier with a dark eye patch and ears, then hand painted and backed with mother of pearl. It is approximately 13 mm round. There is some paint loss evident, but to my mind it just adds character. The outer surface of the crystal also shows some wear...there are light scratches.