Bell & Bird 18k Gold Half Hoop Old Mine Cut Diamond BandBell & Bird 18k Gold Half Hoop Old Mine Cut Diamond Band One of our signature designs. Each ring features a unique set of slightly graduated old mine cut diamonds. It often takes months to collect a suite of stones in the correct size, color, and clarity. This ring features 19th century old mine cut diamonds, approximately 4. 22 carats in total diamond weight. The estimated grades of the stones are H J in color and VS SI in clarity. These are all made