Gahnite, ZnAl2O4, is a rare mineral belonging to the spinel group.

It forms octahedral crystals which may be green, blue, yellow, brown or grey.

Other occurrences include Falun, Sweden where it is found in pegmatites and skarns; and, in the United States, Charlemont, Massachusetts; Spruce Pine, North Carolina; White Picacho district, Arizona; Topsham, Maine; and Franklin, New Jersey.

[2][3] It was first described in 1807 for an occurrence in the Falu mine, Falun, Dalarna, Sweden, and named after the Swedish chemist, Johan Gottlieb Gahn (1745–1818), the discoverer of the element manganese.

This article about a specific oxide mineral is a stub.