Any cut with 58 facets. A brilliant cut can have several shapes: round, oval, radiant (basically square), as well as pear-shaped or heart-shaped.
Collective name for diamond cuts whose lower facets radiate from the centre of the stone towards the girdle, the most common of which is the round cut.
The most common style of diamond cutting, also used for many other gemstones, which consists of a combination of triangular and kite shaped facets. The round brilliant cut features 57 or 58 facets.