NEW YORK – A platinum and diamond necklace with 8.50 carats of Colombian emeralds; a Cartier Art Deco emerald, diamond and platinum ring; and a circa-1900 pin sporting a large apple green demantoid garnet and ruby accents will compete for top-lot status at Jasper52’s Estate Jewelry Auction. It will be conducted on Sunday, May 21, beginning at 8 pm Eastern time. Absentee and Internet live bidding will be available through LiveAuctioneers.