Mineral · Chromates
Crocoite
Pb(CrO4)
Crocoite is lead chromate, the brilliant orange-red prismatic crystals of the Adelaide and Red Lead mines at Dundas, Tasmania, the mineral emblem of that state. It is extremely fragile; specimens ship in custom foam and lose crystals with every handling. Contains lead and hexavalent chromium.
| Formula | Pb(CrO4) |
|---|---|
| IMA status | grandfathered |
| Crystal system | Monoclinic |
| Mohs hardness | 2.5–3 |
| Group | Chromates |
| Type locality | Berezovsk, Urals, Russia |
| Streak | Orange yellow |
| Specific gravity | 6.0 |
| Reference list | IMA List of Minerals (RRUFF) — verify formula and status against the current list |
Handling and safety
Lead and chromate; do not handle crystals, do not breathe dust.
Elsewhere
Cite this article
Stratum Study. "Crocoite" (Mineral). Stratum Study pack 2026.09, as of 2026-09-19. https://stratum.black/study/minerals/crocoite. Accessed 2026-09-20.
@misc{stratum-crocoite,
title = {Crocoite},
author = {{Stratum Study}},
howpublished = {\url{https://stratum.black/study/minerals/crocoite}},
year = {2026},
note = {Mineral article, Stratum Study pack 2026.09, as of 2026-09-19; sources: stratum, wikidata, commons. Accessed 2026-09-20.}
} Citations carry the pack version and the article's as-of date so they resolve to the same text later. The facts themselves belong to the sources listed below; cite those for the science.