The Moussaieff Red Diamond is a diamond measuring 5.11 carats with a triangular brilliant cut (also known as a trillion or a trilliant cut). It has a GIA colour rating of Fancy Red, and is the world’s largest known red diamond.

The Moussaieff Red was discovered in the 1990s by a Brazilian farmer in the Abaetezinho river. The rough stone weighed 13.9 carats and was purchased and cut by the William Goldberg Diamond company who gave it its original name, the Red Shield Diamond. It was subsequently purchased for around $8 million and renamed in the early 2000’s by Moussaieff Jewellers of London.

Moussaieff Red Diamond

Image Credit: GIA

The Moussaieff Red has been on public display twice at the Smithsonian in Washington, D.C. The rare and beautiful stone was featured as part of the “Splendor of Diamonds” Exhibition in 2003, and then again in another exhibition in 2006.

Read about other famous diamonds here.