Gala, iula, geol, gehhol, gehhel; cognate forms are Icel, jol; Dan.
Geol., Mexico, Nos.
Kunz, " Diamonds, a study of their occurrence in the United States, with descriptions and comparisons of those from all known localities" (U.S. Geol.
Dale, The Chief Commercial Granites of Mass., New Hampshire and Rhode Island (Washington, 1908), Bulletin 354 of the U.S. Geol.
1843 (Milan); of Etienne Jules d'Archiac, Histoire du progres de la geologie de 1834 1862 (Paris, Soc. Geol.
Vredenburg, " On the Occurrence of a Species of Halorites in the Trias of Baluchistan," Rec. Geol.
C. Spencer, " Mineral Resources of the Encampment Copper Region, Wyoming," pp. 163-169, U.S. Geol.
Ronaldson, Edinburgh and Johannesburg, 5904); Reports and Memoirs, Geol.
15, 1904, p. 280; also general bibliographies issued by the U.S. Geol.
Watts, Guide to the Collection of Rocks and Fossils, Geol.