A 1-carat diamond ring is a piece of jewelry that features a 1-carat weight diamond or multiple diamonds totalling 1 carat affixed to a circular band, which is usually made out of a precious metal. The ring is meant to be worn on a finger and is sometimes associated with engagement to marry.
The measurement of 1 carat refers to the weight of the diamond or diamonds and is approximately two-tenths of a gram. The current definition, alternatively known as the metric carat, was adopted at the Fourth General Conference on Weights and Measures in France in 1907, and many countries around the world soon followed.
The price of a diamond jumps at the full- and half-carat weights. The diamond or diamonds can be attached to the band of the ring in several ways, including being mounted in prongs, set in a channel inlay, or combined in a halo. The ring itself can be made out of one precious metal or a combination of metals, such as gold, white gold or platinum.
A ring designed to fit a diamond or diamonds is called a setting. You can purchase a 1-carat diamond ring, or design a ring with a total weight of 1 carat, at a jeweler.