Mineral/rock

Derived from or for

Gadolinite

Johan Gadolin (1760-1852), Finnish chemist and discoverer of yttrium

Galena

Latin galena = lead ore or dross remaining after melting lead

Garnet

Latin granatum = a pomegranate since it RESEMBLes their red seeds; alternatively Latin granatus = like a grain since it RESEMBLes seeds or grains embeded in the matrix

Gaylussite

Joseph Louis Gay-Lussac (1778-1850), French chemist, Greek lithos = stone

Gibbsite

George Gibbs (1776-1833), owner of the mineral collection acquired by Yale early in the 19th century

Glaserite

???

Glauberite

Johann Wilhelm Glauber (1603-1668), German chemist

Glauconite

Greek glaucos = originally gleaming, later bluish green, silvery, or gray

Goethite

Johann Wolfgang von Goethe (1749-1832), German poet/philosopher

Graphite

Greek for graphein = to write due to its use in making pencils

Grossularite (garnet)

Latin grossularium = gooseberry for its pale green color

Groutite

Frank Fitch Grout (1880-1958), American petrologist, U of Minnesota