Sulfides.

Sulfide mineral species.

Keep each chapter’s scientific identity: a family, species, variety, trade label, rock and fossil are different kinds of names.

Sphalerite ↗

Mineral species

Sphalerite can be orange, brown, black or other colors, with a resinous-to-brilliant luster. Transparent selected material can be cut into unusually lively collector gems.

Ivar Leidus · CC BY-SA 4.0 · Display crop

Bornite ↗

Mineral species

Bornite is a copper–iron sulfide. A fresh surface and a tarnished surface can look very different, which helps explain the colorful “peacock ore” trade name.

Robert M. Lavinsky · CC BY-SA 3.0 · Display crop