Elements & metals.

Elemental materials, distinct from mineral compounds.

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

Magnesium ↗

Element / metallic specimen

Magnesium is the chemical element Mg, a lightweight silvery metal. An elemental-metal specimen belongs on a different shelf from gemstone minerals, even when sold in the same collection box.

Mark Fergus, CSIRO · CC BY 3.0 · Display crop