One carat equals 200 milligrams in weight.

For diamonds under one carat, each carat is divided into 100 points - similar to pennies in a dollar. 0.75 ct = 75 points, 1/2 ct. = 50 points.

Beauty and Its Beholder: The 4Cs provide a way to objectively compare and evaluate diamonds, but numbers alone can't describe a diamond's mysterious and captivating beauty.