The term "diamond carat" refers to the weight of a diamond, with one carat equivalent to 200 milligrams. Carat weight is a key factor in determining a diamond's value, as larger diamonds are generally rarer and more sought after. However, carat weight alone does not define a diamond's quality; other factors like cut, color, and clarity also play significant roles. When shopping for diamonds, it's important to consider how carat weight affects size and appearance. A diamond with a higher carat weight may look larger, but its overall beauty is influenced by its cut, color, and clarity. Understanding these aspects helps buyers make informed decisions.