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
Wheal Maudlin (Wheal Mawdlin; Wheal Magdalen), Lostwithiel, 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 Wheal Maudlin (Wheal Mawdlin; Wheal Magdalen), Lostwithiel, Cornwall, England, UK
Data Identifiers
Mindat Occurrence Record ID:89
Long-form Identifier:1:3:89:5
GUID (UUID V4):0
Nearest other occurrences of Actinolite
6.6km (4.1 miles) ⓘFowey Consols (incl. Wheal Treasure; Wheal Fortune; Wheal Chance), Tywardreath and Par, Cornwall, England, UK
10.7km (6.6 miles) ⓘBucklers Mine, Charlestown United and Cuddra Consolidated Mines, St Austell, Cornwall, England, UK
12.0km (7.4 miles) ⓘDuporth cliffs, Duporth, St Austell Bay, Cornwall, England, UK
16.8km (10.5 miles) ⓘGreat Dowgas Mine (St Stephen Tin and Copper Mines), Downderry, St Stephen-in-Brannel, Cornwall, England, UK
18.0km (11.2 miles) ⓘSouth Terras Mine (Resugga & Tolgarrick Mine; Union Mine; Uranium Mine), St Stephen-in-Brannel, Cornwall, England, UK
20.0km (12.4 miles) ⓘCheesewring Quarry, Minions, Linkinhorne, Cornwall, England, UK
20.0km (12.5 miles) ⓘClicker Tor Quarry, Lower Clicker, Menheniot, Cornwall, England, UK
21.5km (13.4 miles) ⓘDelabole Slate Quarry, St Teath, Cornwall, England, UK
30.0km (18.6 miles) ⓘGreat Retallack Mine, Perran Iron Lode (Great Perran Iron Lode), Perranzabuloe, Cornwall, England, UK
39.5km (24.5 miles) ⓘGreat Consolidated Mines, Clifford Amalgamated Mines, Gwennap, Cornwall, England, UK
References
Phillips, William (1823) An Elementary Introduction to Mineralogy (3rd ed.)
Golley, Peter, Williams, Richard (1995) Cornish Mineral Reference Manual. Endsleigh Book Co., Truro. 71pp.
 
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