A single stone rectangular cut diamond ring of 6.74 carats is, at 160,000-200,000, the most expensively estimated lot at the James Adam sale of fine jewellery and watches in Dublin on December 3. A pair of diamond ear studs is estimated at 50,000-60,000 and a sapphire and diamond pendant on chain has an estimate of 25,000-30,000. A total of 246 lots will come under the hammer in this evening sale.
