Pope Paul VI's Diamond Cross, circa 1890-1900. Price: Available upon request. Photo M.S. Rau Antiques. 4" wide x 7" length This exquisite cross is perhaps one of the most exceptional historical and significant jeweled treasures we have ever had the opportunity...

A pair of opal and diamond pendent earrings, circa 1890-1900. Photo: Bonhams. Each oval cabochon opal highlighted by collet-set rose-cut diamonds, suspending a cushion-shaped diamond in square collet-setting and a pear-shaped cabochon opal drop, within...