Berthierite is a mineral, a sulfide of iron and antimony with formula . It is steel grey in colour with a metallic lustre, which an iridescent tarnish can cover. Because of its appearance, it is often mistaken for stibnite (, an antimony trisulfide mineral, free of sulfide).
via Wikipedia infobox
Berthierite is a mineral, a sulfide of iron and antimony with formula . It is steel grey in colour with a metallic lustre, which an iridescent tarnish can cover. Because of its appearance, it is often mistaken for stibnite (, an antimony trisulfide mineral, free of sulfide).
It was discovered in France in 1827 and named for the French chemist, Pierre Berthier (1782–1861).
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).