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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Calcite from
Milltown Quarry, Milltown, Ashover, North East Derbyshire District, Derbyshire, England, UK


09304330017363417673713.jpg
Calcite, etc.

Milltown Quarry, Milltown, Ashover, North East Derbyshire District, Derbyshire, England, UK
05559540017271998311066.jpg
Calcite, etc.

Milltown Quarry, Milltown, Ashover, North East Derbyshire District, Derbyshire, England, UK
07555690017271998326514.jpg
Calcite

Milltown Quarry, Milltown, Ashover, North East Derbyshire District, Derbyshire, England, UK
08307630017271998333425.jpg
Calcite

Milltown Quarry, Milltown, Ashover, North East Derbyshire District, Derbyshire, England, UK
02522640017271998531075.jpg
Calcite, etc.

Milltown Quarry, Milltown, Ashover, North East Derbyshire District, Derbyshire, England, UK
05559540017271998311066.jpg
Calcite, etc.

Milltown Quarry, Milltown, Ashover, North East Derbyshire District, Derbyshire, England, UK
07555690017271998326514.jpg
Calcite

Milltown Quarry, Milltown, Ashover, North East Derbyshire District, Derbyshire, England, UK
08307630017271998333425.jpg
Calcite

Milltown Quarry, Milltown, Ashover, North East Derbyshire District, Derbyshire, England, UK
02964810017367013181020.jpg
Calcite, etc.

Milltown Quarry, Milltown, Ashover, North East Derbyshire District, Derbyshire, England, UK
05559540017271998311066.jpg
Calcite, etc.

Milltown Quarry, Milltown, Ashover, North East Derbyshire District, Derbyshire, England, UK
07555690017271998326514.jpg
Calcite

Milltown Quarry, Milltown, Ashover, North East Derbyshire District, Derbyshire, England, UK
08307630017271998333425.jpg
Calcite

Milltown Quarry, Milltown, Ashover, North East Derbyshire District, Derbyshire, England, UK
Locality type:Quarry
Classification
Species:Calcite
Formula:CaCO3
Comments:Common as a massive vein filling to 2mts, rare cavitys display crystals to 2.5cms, some with micro pyrite inclusions. With in the zinc oxide area calcite forms crystalline 'stallactites', very rare pinkish acute rhombs, and pseudoctahedral crystals.
Habit:Scalenohedron, and micro rombic crystals, stalactites
Colour:Colourless, white, pale brown, pale pink
Abundance at site:Very common
Confirmation
Validity:Confirmed
Confirmation Methods:XRD
Confirmation Details:Where Tested and Reference ID: NHM London
Associated Minerals:
Associates:Ashoverite
Baryte
Cerussite
Ettringite
Fluorite
Galena
Hemimorphite
Litharge
Massicot
Palygorskite
Pyrite
Quartz
Smithsonite
Sphalerite
Sweetite
Weddellite
Associated Minerals Based on Photo Data:
Fluorite10
Sweetite4
Ashoverite4
Baryte3
Palygorskite3
Cerussite3
Litharge2
Ettringite1
Petroleum1
- var Bitumen1
Unnamed (Tetragonal Pb Oxide Hydrate)1
Smithsonite1
Hydrocerussite1
Massicot1
Data
Mineral Data:Click here to view Calcite data
Locality Data:Click here to view Milltown Quarry, Milltown, Ashover, North East Derbyshire District, Derbyshire, England, UK
Photo GalleryView Gallery (6 photos)
Data Identifiers
Mindat Occurrence Record ID:14383
Long-form Identifier:1:3:14383:7
GUID (UUID V4):0
Nearest other occurrences of Calcite
0.2km (0.1 miles) ⓘNew Milltown Quarry, Milltown, Ashover, North East Derbyshire District, Derbyshire, England, UK
0.3km (0.2 miles) ⓘFall Hill Quarry, Milltown, Ashover, North East Derbyshire District, Derbyshire, England, UK
0.7km (0.4 miles) ⓘHockley Quarry, Ashover, North East Derbyshire District, Derbyshire, England, UK
0.7km (0.5 miles) ⓘOverton Hall Mine (Overton Mine), Overton Hall, Ashover, North East Derbyshire District, Derbyshire, England, UK
1.0km (0.6 miles) ⓘGregory Mine, Overton Hall, Ashover, North East Derbyshire District, Derbyshire, England, UK
5.8km (3.6 miles) ⓘMatlock, Derbyshire Dales District, Derbyshire, England, UK
6.3km (3.9 miles) ⓘRiber mine, Matlock, Derbyshire Dales District, Derbyshire, England, UK
6.4km (4.0 miles) ⓘDimple Mine, Matlock, Derbyshire Dales District, Derbyshire, England, UK
6.6km (4.1 miles) ⓘCrich Quarry (Crich Cliff Quarry; Cliff Quarry), Crich, Amber Valley, Derbyshire, England, UK
6.9km (4.3 miles) ⓘRutland Cave Mine (Rutland Mine; Nestus Mine), Heights of Abraham, Matlock Bath, Derbyshire Dales District, Derbyshire, England, UK
References
Mineralogical Magazine(1984) 48, 267-269
Rust, Steve A. (1994) Seltene Mineralien aus dem Milltown-Steinbruch bei Ashover, Derbyshire, Großbritannien [Rare minerals from the Milltown Quarry near Ashover, Derbyshire, UK]. Lapis, 19 (12). 13-17; 58
 
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