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Crocoite With Gibbsite

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CYF619336

Crocoite With Gibbsite

Description Tabs

Description
Locality: 
Adelaide Mine, Dundas, West Coast Municipality, Tasmania, Australia
Class: 
Crystals on Matrix
Size Range: 
Cabinet (10-18 cm)
Size: 
11 × 8 × 5 cm
Description

A unique specimen of crocoite with dundasite from the Adelaide mine in Tasmania.  This piece is quite unusual with at least 3 generations of crocoite growth and the gibbsite being super fine (looks almost like rice crispies)!  There also appears to be some replacement of some crocoite crystals with gibbsite.

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