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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Actinolite from
Great Retallack Mine, Perran Iron Lode (Great Perran Iron Lode), Perranzabuloe, Cornwall, England, UK


Locality type:Mine
Classification
Species:Actinolite
Formula:◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Actinolite data
Locality Data:Click here to view Great Retallack Mine, Perran Iron Lode (Great Perran Iron Lode), Perranzabuloe, Cornwall, England, UK
Data Identifiers
Mindat Occurrence Record ID:91
Long-form Identifier:1:3:91:8
GUID (UUID V4):0
Nearest other occurrences of Actinolite
13.9km (8.6 miles) ⓘWheal Unity, Gwennap, Cornwall, England, UK
14.4km (8.9 miles) ⓘGreat Consolidated Mines, Clifford Amalgamated Mines, Gwennap, Cornwall, England, UK
14.6km (9.0 miles) ⓘSouth Terras Mine (Resugga & Tolgarrick Mine; Union Mine; Uranium Mine), St Stephen-in-Brannel, Cornwall, England, UK
17.4km (10.8 miles) ⓘGreat Dowgas Mine (St Stephen Tin and Copper Mines), Downderry, St Stephen-in-Brannel, Cornwall, England, UK
19.2km (11.9 miles) ⓘNorth Wheal Crofty, Pool, Carn Brea, Cornwall, England, UK
19.9km (12.4 miles) ⓘNorth Roskear Mine, North Roskear, Camborne, Cornwall, England, UK
20.1km (12.5 miles) ⓘSouth Roskear Mine, South Roskear group (Pendarves Consols), Camborne, Cornwall, England, UK
20.1km (12.5 miles) ⓘDolcoath Mine, Camborne, Cornwall, England, UK
24.5km (15.2 miles) ⓘBucklers Mine, Charlestown United and Cuddra Consolidated Mines, St Austell, Cornwall, England, UK
24.9km (15.5 miles) ⓘDuporth cliffs, Duporth, St Austell Bay, Cornwall, England, UK
References
Golley, Peter, Williams, Richard (1995) Cornish Mineral Reference Manual. Endsleigh Book Co., Truro. 71pp.
 
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