![](http://www.ecns.cn/hd/2022/01/29/19aae3c6fb0048699b49356ebe2a522a.jpg)
A 555.55 carat black diamond named The Enigma is seen before being auctioned at Sotheby's in Beverly Hills, California, U.S., Jan. 26, 2022. (Photo/Agencies)
![](http://www.ecns.cn/hd/2022/01/29/865c1382b6624f3e8435a45e4e6c9953.jpg)
A 555.55 carat black diamond named The Enigma is seen before being auctioned at Sotheby's in Beverly Hills, California, U.S., Jan. 26, 2022. (Photo/Agencies)
![](http://www.ecns.cn/hd/2022/01/29/1088b1379c9744bd9d315b047fd0cf0a.jpg)
A 555.55 carat black diamond named The Enigma is seen before being auctioned at Sotheby's in Beverly Hills, California, U.S., Jan. 26, 2022. (Photo/Agencies)