Sotheby's is back again with September's Important Jewels Auction, beginning in New York on Sept. 24. The crown jewel of the auction is a 19.51 carat Harry Winston platinum and diamond ring, expected to bring in record breaking prices of $1.2-$1.8 million. The emerald step cut center stone is flanked by two trillion cut diamonds, a spectacular piece of craftsmanship highlighting a brilliant center stone. Not to be overshadowed, a private collector is featuring a 15.10 ct platinum and diamond ring with a stunning pear shaped center stone, predicted to bring in numbers close to the Harry Winston ring. Other highlights to the auction include a platinum, palladium, and diamond triple-band cuff bracelet worn by the late animal welfare activist Elisabeth Lewyt on her wedding day is expected to rake in $40,000–$60,000 and a 1.08 ct. platinum, fancy vivid blue diamond could bring in $450,000–$650,000. There is also a platinum, diamond, and colored stone "rose" bracelet from Tiffany & Co. is expected to sell for $150,000–$200,000.