The Piel CP.60 Diamant is a single-engine light aircraft designed in France in the 1960s and marketed for home building.

[1] The Diamant is a conventional, low-wing cantilever monoplane and essentially an enlarged version of Piel's successful Emeraude designed to accommodate more passengers.

[1][2] This extra capacity is provided by a redesigned fuselage which is higher in the rear section and longer overall.

[4] As with the Emeraude, Piel obtained type certification for the Diamant, allowing it to be manufactured on a commercial basis.

[5] By the late 1970s, the original versions of the Diamant were no longer offered and had been supplanted by the Super Diamant, designed for more powerful engines and featuring revised tail surfaces.