Eucrites consist of basaltic rock from the crust of 4 Vesta or a similar parent body.

They are mostly composed of calcium-poor pyroxene, pigeonite, and calcium-rich plagioclase (anorthite).

[1] Based on differences of chemical composition and features of the component crystals, they are subdivided into several groups:[2] Eucrites get their name from the Greek word eukritos meaning "easily distinguished".

This refers to the silicate minerals in them, which can be easily distinguished because of their relatively large grain size.

Eucrite is also a now obsolete term for bytownite-gabbro, an igneous rock formed in the Earth's crust.