Costco offered Princess Cut Diamond Necklace (0.36 ctw) 14kt White Gold at $0.00. On 2012-06-07, Costco reduced price by $60 from previous $659.99. It's the best offer since 2012-06-07. That was also the latest price drop.which was higher than today's price. This offer might be expired. The last price tracking was done on 2013-07-01.