geffroyite

English

Etymology

Geffroyite was named in honor of Jaques Geffroy, a metallurgist for the French Atomic Energy Commission.

geffroy + -ite

Noun

geffroyite

1. (mineralogy) An isometric-hexoctahedral bronze brown mineral containing copper, iron, selenium, silver, and sulfur.

References

• David Barthelmy (1997–2025) “Geffroyite”, in Webmineral Mineralogy Database.