The “Williamson Pink Star” diamond is 11.15 carats, cushion-cut and has “internally flawless clarity,” according to the Sotheby’s website. The diamond’s name is in tribute to two other pink diamonds, Reuters reported. One is the “CTF Pink Star” — a 59.60-carat diamond that sold at auction for $71.2 million in 2017. The other is the “Williamson” stone, a 23.60-carat diamond that was given to Queen Elizabeth as a wedding present, according to Reuters. Click here to read full article.