gabrielite

== English == === Etymology === Named after Swiss mineral photographer Walter Gabriel, +‎ -ite. === Noun === gabrielite (uncountable) (mineralogy) A triclinic-pinacoidal black mineral containing antimony, arsenic, copper, silver, sulfur, and thallium. === Further reading === David Barthelmy (1997–2026), “Gabrielite”, in Webmineral Mineralogy Database. “gabrielite”, in Mindat.org, Keswick, Va.: Hudson Institute of Mineralogy, 2000–2026.