Use the noun virtuosity to describe an impressive skill, such as a classical musician's virtuosity at playing the cello.
Lots of people have talents, but only a select few, called virtuosos, have the superior quality of virtuosity. A piano virtuoso, for example, is able to play and improvise at the highest level possible. People can also display virtuosity in speaking, in writing computer code, in cooking, or in other skills. In the late fifteenth century, virtuosity specifically meant "manly qualities," from the Latin root virtutem, "manliness, valor, or excellence."