A boat-shaped diamond that is long, thin and wider in the middle. A modified brilliant cut, it has as many as 64 facets and the table is pointed at both ends. The number of facets may vary depending on the overall proportions of the stone.
MARQUISE was a 1997 technology demonstration conducted by Silicon Graphics/Cray, the Department of Defense, and the University of Maryland, College Park. The achieved goal was to shrink a refrigerator-sized Cray J90 supercomputer to fit in a standard 19-inch rack for use in embedded defense applications aboard an aircraft. The project included research in packaging multiple integrated circuits onto a diamond-substrate multi-chip module (MCM) and spray-evaporative cooling, both of which found use in a later Cray product, the Cray X1.