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Crocoite & Gibbsite

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PJM70187

Crocoite & Gibbsite

Description Tabs

Description
Locality: 
Adelaide Mine, Dundas, West Coast Municipality, Tasmania, Australia
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.5 × 2.8 × 3 cm
Description

A hollow limonitic gossan cast of possible some tree roots has oxidised brown on the exterior and internal black.

Creamy yellow gibbsite crystals cover the surface of the matrix, at some later stage both the exterior and interior of the cast have recieved a generous smattering of orange isolated acicular crystals

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...

Gibbsite

Formula: 
Al(OH)3
Strunz: 
4.FE.10
Hardness: 
2.5 - 3.0
Streak: 
White
Type Locality: 
Richmond, Berkshire Co., Massachusetts, USA
Earthstones Australia

Seller Information

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