Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Dolomite from
Smallcleugh Mine, Nenthead, Alston Moor, Eden, Cumbria, England, UK


06904700017272057359090.jpg
Dolomite

Smallcleugh Mine, Nenthead, Alston Moor, Eden, Cumbria, England, UK
01126300017378278372394.jpg
Dolomite

Smallcleugh Mine, Nenthead, Alston Moor, Eden, Cumbria, England, UK
01991550017271998663532.jpg
Dolomite, etc.

Smallcleugh Mine, Nenthead, Alston Moor, Eden, Cumbria, England, UK
07348720017271998674449.jpg
Dolomite, etc.

Smallcleugh Mine, Nenthead, Alston Moor, Eden, Cumbria, England, UK
01214000017367734292174.jpg
Dolomite

Smallcleugh Mine, Nenthead, Alston Moor, Eden, Cumbria, England, UK
01126300017378278372394.jpg
Dolomite

Smallcleugh Mine, Nenthead, Alston Moor, Eden, Cumbria, England, UK
01869960017272355237790.jpg
Dolomite, etc.

Smallcleugh Mine, Nenthead, Alston Moor, Eden, Cumbria, England, UK
06532980017272355231633.jpg
Dolomite, etc.

Smallcleugh Mine, Nenthead, Alston Moor, Eden, Cumbria, England, UK
06904700017272057359090.jpg
Dolomite

Smallcleugh Mine, Nenthead, Alston Moor, Eden, Cumbria, England, UK
06102350017378278378786.jpg
Dolomite

Smallcleugh Mine, Nenthead, Alston Moor, Eden, Cumbria, England, UK
01991550017271998663532.jpg
Dolomite, etc.

Smallcleugh Mine, Nenthead, Alston Moor, Eden, Cumbria, England, UK
07348720017271998674449.jpg
Dolomite, etc.

Smallcleugh Mine, Nenthead, Alston Moor, Eden, Cumbria, England, UK
Locality type:Mine
Classification
Species:Dolomite
Formula:CaMg(CO3)2
Comments:Most of the specimens which have been classified as dolomite are actually ankerite. But dolomite has been found as Zn/Mg enriched crystals associated with a nickel berring area in the mine. Tests should be under take to confirm that a specimen is dolomite.
Colour:White to colourless, yellow.
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Sphalerite27
Calcite17
Quartz16
Chalcopyrite8
Siderite6
Fluorite5
Galena5
Pyrite4
Data
Mineral Data:Click here to view Dolomite data
Locality Data:Click here to view Smallcleugh Mine, Nenthead, Alston Moor, Eden, Cumbria, England, UK
Photo GalleryView Gallery (3 photos)
Data Identifiers
Mindat Occurrence Record ID:4640
Long-form Identifier:1:3:4640:4
GUID (UUID V4):0
Nearest other occurrences of Dolomite
0.5km (0.3 miles) ⓘMiddlecleugh Upper Level, Nenthead, Alston Moor, Eden, Cumbria, England, UK
0.9km (0.5 miles) ⓘCaplecleugh Mine, Nenthead, Alston Moor, Eden, Cumbria, England, UK
2.1km (1.3 miles) ⓘBrownley Hill Mine (Bloomsberry Horse Level), Nenthead, Alston Moor, Eden, Cumbria, England, UK
5.1km (3.2 miles) ⓘTynebottom Mine, Garrigill, Alston Moor, Eden, Cumbria, England, UK
5.8km (3.6 miles) ⓘTynehead Mine, Garrigill, Alston Moor, Eden, Cumbria, England, UK
7.0km (4.3 miles) ⓘLong Grain Trial, Alston Moor, Eden, Cumbria, England, UK
7.6km (4.7 miles) ⓘAllenheads Mine (Beaumont Mine), Allendale, Northumberland, England, UK
8.8km (5.5 miles) ⓘCarricks Mine, Ireshopeburn, Stanhope, County Durham, England, UK
10.2km (6.3 miles) ⓘFrazer's Hush Mine, Rookhope, Stanhope, County Durham, England, UK
12.5km (7.7 miles) ⓘMiddlehope Burn, Westgate, Stanhope, County Durham, England, UK
References
Zn/Mg rich dolomite S.Rust Collection
Dunham, K.C. (1990) Geology of the Northern Pennine Orefield, Volume 1, Tyne to Stainmore. 2nd edition, British Geological Survey.
 
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