What is the smallest size of a diamond?

Answer 1

As raw stones, a diamond can be as small as a grain of sand. As a cut stone, 1/100th of a carat, or .01 carat, also called one point is the smallest descriptive value found in a brief search.

Answer 2

The smallest size of a diamond is typically around 1mm (0.005 carats). These tiny diamonds are often used in small accent stones in jewelry or in pave settings to add sparkle.