Buying unmounted stones comes with a host of benefits, especially when they are diamonds sourced and provided by Diacore, the esteemed diamond manufacturer known for the legendary 203.04 carat De Beers Millennium Star and the CTF Pink Star, a 59.60 carat flawless Fancy Vivid Pink diamond, which sold at Sotheby’s in 2017 for a staggering $71.2 million. Through December, Sotheby’s will have regular online auctions of loose diamonds in a variety of shapes, sizes and colors, all of which present the freedom to create your own bejeweled story. Below, read our top reasons for buying loose diamonds at Sotheby’s and click here to view the latest on offer in Diamonds Online | Capsule Collection (17–24 October).