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Crocoite is a compound of lead and chromium (lead chromate). it is the chromium that gives this rare mineral its vibrant red-orange color. The most notable source for crocoite is The Dundas District in Tasmania, where it was once mined for lead. Crocoite is also considered the unofficial gem of this Australian island state.
PbCrO4 - Lead Chromate
Class:
Sulfates
Subclass:
Chromates
Orange, red
Orange-yellow
Adamantine to greasy
Translucent
6
3
Good
Conchoidal to uneven
Long prismatic to acicular crystals, crusts.
Non-fluorescent
Frequency:
Rare
Origin:
Secondary, as a result of the galena oxidation in basic rocks.
Occurence:
Dundas District of Tasmania, Australia; Berezovask, Ural mountains, Russia; Callenberg, Germany.
Application:
A minor ore of chromium and as a mineral specimen.

 
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