The Diamantina sabrewing (Campylopterus diamantinensis) is a Near-threatened species of hummingbird in the "emeralds", tribe Trochilini of subfamily Trochilinae.

The other three pairs have bright bronze-green bases that grades through dark olive gray to a wide white tip.

[8] The Diamantina sabrewing is found only in the Espinhaço Range of southeastern Brazil's Minas Gerais state.

It inhabits forested streams and ravines in campos rupestre, a high elevation, dry, fire-prone biome between 1,000 and 2,000 m (3,300 and 6,600 ft).

[1] Its habitat "is not presently experiencing major direct human disturbance" and part of it is protected in two national parks.