Moving mountains for you
Switch currency

Current Live Auctions

Current Live Fixed Price Sales

Coronadite & Romanèchite With Fluorite

Views:
Watches:
PCZ619067

Coronadite & Romanèchite With Fluorite

Description Tabs

Description
Locality: 
Low Skears Mine, Middleton In Teesdale, County Durham, United Kingdom
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
7 × 4.5 × 2.5 cm
Description

A very rare combination of coronadite and romanechite on yellow fluorite.  Very hard to obtain material from a less common British locality. 

Mineral Data
What's on the rock

Coronadite

Formula: 
Pb(Mn64+Mn23+)O16
Strunz: 
4/D.08-70
Crystal System: 
Monoclinic
Hardness: 
4½ - 5
Colour: 
Dark gray, black
Type Locality: 
Horseshoe Mine, Coronado Mine, Coronado vein, Copper Plate Gulch, Copper Mountain District, Greenlee County, Arizona, USA
Isostructural with: 
Cryptomelane
Ferrihollandite
Hollandite
Manjiroite
Strontiomelane

Romanèchite

Formula: 
(Ba,H2O)2Mn5O10
Strunz: 
4.DK.10
Hardness: 
5.0 - 6.0
Type Locality: 
Manganese deposit, Romanèche-Thorens, La Chapelle-de-Guinchay, Saône-et-Loire, Burgundy, France

Fluorite

Formula: 
CaF2
Strunz: 
3.AB.25
Crystal System: 
Isometric
Hardness: 
4.0
Streak: 
White
Type Locality: 
Jáchymov (St Joachimsthal), Jáchymov District (St Joachimsthal), Krušné Hory Mts (Erzgebirge), Karlovy Vary Region, Bohemia (Böhmen; Boehmen), Czech Republic