The old mine cut (OMC), also known as miners cut, mine cut, old miner cut and old miners cut, is an antique cutting style featuring 58 brilliant facets designed to accommodate the lighting environments of the time. Old mine diamonds were not highly symmetrical; however, they were cut to sparkle in low and warm lighting derived from candlelights. It is generally considered that the old mine cut had a square shape with rounded corners; however, old mine diamonds came in a variety of shapes such as pear, marquise and triangular, except for round.