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
Delabole Slate Quarry, St Teath, Cornwall, England, UK


Locality type:Quarry
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 Delabole Slate Quarry, St Teath, Cornwall, England, UK
Data Identifiers
Mindat Occurrence Record ID:92
Long-form Identifier:1:3:92:5
GUID (UUID V4):0
Nearest other occurrences of Actinolite
21.5km (13.4 miles) ⓘWheal Maudlin (Wheal Mawdlin; Wheal Magdalen), Lostwithiel, Cornwall, England, UK
21.5km (13.4 miles) ⓘCheesewring Quarry, Minions, Linkinhorne, Cornwall, England, UK
28.1km (17.5 miles) ⓘFowey Consols (incl. Wheal Treasure; Wheal Fortune; Wheal Chance), Tywardreath and Par, Cornwall, England, UK
30.7km (19.1 miles) ⓘClicker Tor Quarry, Lower Clicker, Menheniot, Cornwall, England, UK
31.2km (19.4 miles) ⓘBucklers Mine, Charlestown United and Cuddra Consolidated Mines, St Austell, Cornwall, England, UK
32.7km (20.3 miles) ⓘDuporth cliffs, Duporth, St Austell Bay, Cornwall, England, UK
34.4km (21.4 miles) ⓘSouth Terras Mine (Resugga & Tolgarrick Mine; Union Mine; Uranium Mine), St Stephen-in-Brannel, Cornwall, England, UK
34.8km (21.6 miles) ⓘGreat Dowgas Mine (St Stephen Tin and Copper Mines), Downderry, St Stephen-in-Brannel, Cornwall, England, UK
39.9km (24.8 miles) ⓘGreat Retallack Mine, Perran Iron Lode (Great Perran Iron Lode), Perranzabuloe, Cornwall, England, UK
44.8km (27.8 miles) ⓘNorth Mine (East Wheal Friendship), Devon United Mines, Peter Tavy, West Devon, Devon, England, UK
References
Collins, J. H. (1871) A Handbook to the Mineralogy of Cornwall and Devon. Heard and Sons, Truro.
 
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