Walfordite is a very rare tellurite mineral that was discovered in Chile in 1999. The mineral is described as orange with orange-yellow streak, and is determined to have a chemical formula of Fe<sup>3+</sup>,Te<sup>6+</sup>Te<sup>4+</sup><sub>3</sub>O<sub>8</sub> with minor titanium and magnesium substitution resulting in an approximate empirical formula of (Fe<sup>3+</sup>,Te<sup>6+</sup>,Ti<sup>4+</sup>,Mg)(Te<sup>4+</sup>)<sub>3</sub>O<sub>8</sub>.
The only reported occurrence is in the Wendy open pit, El Indio-Tambo mining district of the Coquimbo Region, northern Chile where it occurs in oxidized breccia associated with a tellurium-bearing gold deposit. Associated minerals include: alunite, rodalquilarite, native gold, emmonsite, jarosite and pyrite. The mineral was named for mine geologist Phillip Walford (1945â ) who first noted the mineral.<Ref name=HBM/>