553 An 18ct white gold and diamond Art Deco style ring, with 2.36ct central diamond surrounded by pave set old European cut and brilliant cut diamonds, stamped “18ct” , 6.7 grams total, [Diamond & Gemstone Bourse (Aust.) insurance valuation $31,000] $8,000–12,000 554 An 18ct white gold and diamond panther ring, set with 206 brilliant cut diamonds, stamped “750” , [Diamond & Gemstone Bourse (Aust.) insurance valuation $8,850], $3,000–5,000 554 553 101