A 2-carat diamond refers to a diamond that weighs two carats, which is equivalent to 0.4 grams. The carat weight is a key factor in determining a diamond's value, along with its cut, color, and clarity. A larger diamond, such as a 2-carat stone, is often considered more desirable and can be more expensive due to its rarity. In the world of gemstones, diamonds are prized for their brilliance and durability. A 2-carat diamond can be used in various types of jewelry, including engagement rings and necklaces, making it a popular choice for special occasions. The size and quality of the diamond can significantly impact its overall appearance and price.