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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Muscovite from
Cligga Head, Perranporth, Perranzabuloe, Cornwall, England, UK


Locality type:Headland
Classification
Species:Muscovite
Formula:KAl2(AlSi3O10)(OH)2
Age information
Maximum recorded age:275 ± 6 Ma
Minimum recorded age:275 ± 6 Ma
Sample ages:
Recorded ageGeologic TimeSampleDating method
1275 ± 6 MaCisuralianCH/1K/Ar
Sample references:
1CH/1
Halliday, A. N. (1980). The timing of early and main stage ore mineralization in Southwest Cornwall. Economic Geology, 75(5), 752-759.
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Quartz2
Topaz1
Connellite1
Cassiterite1
Stannite1
Scorodite1
Metazeunerite1
Data
Mineral Data:Click here to view Muscovite data
Locality Data:Click here to view Cligga Head, Perranporth, Perranzabuloe, Cornwall, England, UK
Data Identifiers
Mindat Occurrence Record ID:7943
Long-form Identifier:1:3:7943:3
GUID (UUID V4):0
Nearest other occurrences of Muscovite
2.9km (1.8 miles) ⓘTurnavore Mine, St Agnes Consols (Polberro Consols), St Agnes, Cornwall, England, UK
4.4km (2.8 miles) ⓘCameron Quarry, St Agnes, Cornwall, England, UK
7.6km (4.7 miles) ⓘWheal Concord, East Treskerby Mine, Skinners Bottom, St Agnes, Cornwall, England, UK
8.9km (5.5 miles) ⓘGreat Wheal Busy (Chacewater Mine), Chacewater, Cornwall, England, UK
10.0km (6.2 miles) ⓘWheal Unity Wood (Tolgullow United Mine; West Poldice Mine), Chacewater, Cornwall, England, UK
10.7km (6.6 miles) ⓘPoldice Mine, St Day United Mines (Poldice Mines), Gwennap, Cornwall, England, UK
10.7km (6.7 miles) ⓘWheal Gorland, St Day, Cornwall, England, UK
11.2km (7.0 miles) ⓘWheal Maid, Gwennap, Cornwall, England, UK
12.1km (7.5 miles) ⓘMount Wellington Mine (Wheal Magpie), Cusgarne, Gwennap, Cornwall, England, UK
14.5km (9.0 miles) ⓘSouth Crofty Mine, Pool, Carn Brea, Cornwall, England, UK
References
 
and/or  
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