Gertrude Selma Sober Field (December 26, 1869 — November 2, 1949) was an American geologist and mining company executive, credited with discovering the zinc in the Arbuckle Mountains in Oklahoma.

[1] Sober worked as a stenographer and teacher in Oklahoma,[2] but she experimented with raising crops, and enjoyed searching for minerals in her free time.

[3] She began raising money for a mining company in 1906,[4] and was called by one Oklahoma newspaper a "noted mineralogist and geologist" as early as 1907.

[6] She and Hope formed the short-lived Indian Mining and Development Company, with Sober as president.

[7] In 1988, she was inducted into the National Mining Hall of Fame in Colorado, with her nomination promoted by the Association for Women Geoscientists.