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Crocoite & Dundasite

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PMN712205

Crocoite & Dundasite

Description Tabs

Description
Locality: 
Adelaide Mine, Dundas, West Coast Municipality, Tasmania, Australia
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
9 × 8 × 3 cm
Largest Crystal: 
2.00cm
Weight: 
60.00gr
Description

The appealing orange crocoites sit in a protected vug set off against a white dundasite/gibbsite layer. I am calling this out as dundasite based on information given to me by the miner but certainly it is hard to visually distinguish from gibbsite like this. Other specimens from this find were analysed and showed dundasite.

Mineral Data
What's on the rock

Crocoite

Formula: 
Pb(CrO4)
Strunz: 
7.FA.20
Crystal System: 
Monoclinic
Hardness: 
2.5 - 3.0
Type Locality: 
Tsvetnoi Mine, Uspenskaya Mt, Berezovskoe Au Deposit (Berezovsk Mines), Berezovskii (Berezovskii Zavod), Ekaterinburg (Sverdlovsk), Sverdlovskaya Oblast', Middle Urals, Urals Region, Russia...

Dundasite

Formula: 
PbAl2(CO3)2(OH)4·H2O
Strunz: 
5.DB.10
Crystal System: 
Orthorhombic
Hardness: 
2.0
Type Locality: 
Adelaide Mine (Adelaide Pty Mine; Adelaide Proprietary Mine), Dundas mineral field, Zeehan District, Tasmania, Australia