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The exhibit includes some spectacular examples, like an intense blue-green chrysocolla; a pockmarked, deep orange crocoite; and a glittery, blood-red chunk of rhodochrosite.

Called crocoite, it resembled bright orange-red needles.

It was discovered at Berezovsk near Ekaterinburg in the Urals in 1766; and named crocoise by F. S. Beudant in 1832, from the Greek κρόκος, saffron, in allusion to its colour, a name first altered to crocoisite and afterwards to crocoite.

Associated with crocoite at Berezovsk are the closely allied minerals phoenicochroite and vauquelinite.