Auction record per carat paid for a ruby at US$551,000 per carat. A superb 6.04ct pigeon’s blood Burma, no heat cushion-shaped ruby and diamond ring, by Etcetera.Estimate HK$8,000,000-12,000,000. US$1,000,000-1,500,000. © Christie’s Images Limited 2012. Price realised HK$25,860,000 ($3,347,918)