* An 18 Karat Yellow Gold, Opal and Diamond Necklace, Italian, containing one oval cabochon cut opal measuring approximately 20.00 x 13.85 mm, one oval cabochon cut opal measuring approximately 14.85 x 11.45 mm, one oval cabochon cut opal measuring approximately 14.95 x 11.15 mm and 108 round brilliant cut diamonds weighing approximately 6.75 carats total. Stamp: 750 (Italian hallmarks). 67.10 dwts. Estimate 3,000-5,000 Property from the Collection of Paul Walker, Scottsdale, Arizona