For many years, one of the finest rubies in the world was the Alan Caplan ruby, named after a famous geologist and mineralogist who bought the ruby during the 1960s. The ruby is also known as the Mogok ruby because that is where it originated. It’s a 15.97 carat ruby and it was bought by Graff in 1988, who paid a record-breaking price of $227,301 per carat. Since then a number of rubies have surpassed that record and since 2015, the Sunrise Ruby, a 25.59 carat Burmese ruby, is the most valuable ruby in the world. It was auctioned for $30,335,698, which is an unprecedented $1.1 million per carat.