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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Tyrolite from
Matlock, Derbyshire Dales District, Derbyshire, England, UK


Locality type:Town
Classification
Species:Tyrolite
Formula:Ca2Cu9(AsO4)4(CO3)(OH)8 · 11H2O
Comments:Ryback et al. (1988): "The 'tyrolite' from Matlock, Derbyshire (Hintze, vol. 1, Abt. 4, pt. 2, p. 1078; Dana, 7th edn, vol. 2, p. 926) remains unconfirmed, and was probably aurichalcite, which H.J.A. Brooke (1823) Quart. J. Lit. Sci. Arts 16, 277 confusingly called 'Kupferschaum'."
Confirmation
Validity:Unconfirmed/Questioned
Data
Mineral Data:Click here to view Tyrolite data
Locality Data:Click here to view Matlock, Derbyshire Dales District, Derbyshire, England, UK
Data Identifiers
Mindat Occurrence Record ID:487151
Long-form Identifier:1:3:487151:4
GUID (UUID V4):0
Nearest other occurrences of Tyrolite
47.5km (29.5 miles) ⓘWood mine, Alderley Edge, Cheshire, England, UK
51.8km (32.2 miles) ⓘNew Cliffe Hill Quarry, Cliffe Hill Quarry, Stanton under Bardon, Hinckley and Bosworth, Leicestershire, England, UK
References
Hintze, vol. 1, Abt. 4, pt. 2, p. 1078.
Palache, Charles; Berman, Harry; Frondel, Clifford (1951) The System of Mineralogy (7th ed.) Vol. 2 - Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Etc. John Wiley and Sons.p.926
Livingstone, A., Macpherson, H. G. (1983) Fifth supplementary list of British minerals (Scottish) Mineralogical Magazine, 47 (342) 99-105 doi:10.1180/minmag.1983.047.342.23
Ryback, George, Nawaz, R., Farley, E. (1988) Seventh supplementary list of British Isles minerals (Irish) Mineralogical Magazine, 52 (365) 267-274
 
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