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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Hornblende Root Name Group from
South Terras Mine (Resugga & Tolgarrick Mine; Union Mine; Uranium Mine), St Stephen-in-Brannel, Cornwall, England, UK


Locality type:Mine
Classification
Species:'Hornblende Root Name Group' (not an IMA approved species)
Formula:◻Ca2(C42+C3+)(AlSi7O22)W2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Hornblende Root Name Group data
Locality Data:Click here to view South Terras Mine (Resugga & Tolgarrick Mine; Union Mine; Uranium Mine), St Stephen-in-Brannel, Cornwall, England, UK
Data Identifiers
Mindat Occurrence Record ID:6278
Long-form Identifier:1:3:6278:7
GUID (UUID V4):0
Nearest other occurrences of Hornblende Root Name Group
3.0km (1.9 miles) ⓘGreat Dowgas Mine (St Stephen Tin and Copper Mines), Downderry, St Stephen-in-Brannel, Cornwall, England, UK
14.6km (9.0 miles) ⓘGreat Retallack Mine, Perran Iron Lode (Great Perran Iron Lode), Perranzabuloe, Cornwall, England, UK
22.9km (14.2 miles) ⓘLower Treluswell, St Gluvias, Cornwall, England, UK
25.0km (15.5 miles) ⓘTresavean Mine, Lanner, Lanner, Cornwall, England, UK
26.7km (16.6 miles) ⓘNew Tolgus Shaft, Tarewaste, Redruth, Cornwall, England, UK
29.1km (18.1 miles) ⓘNorth Wheal Crofty, Pool, Carn Brea, Cornwall, England, UK
29.6km (18.4 miles) ⓘWheal Crofty (Old Wheal Crofty; incl. Wheal Knight; Wheal Vernon), North Roskear, Camborne, Cornwall, England, UK
29.8km (18.5 miles) ⓘDolcoath Mine, Camborne, Cornwall, England, UK
30.0km (18.6 miles) ⓘNew Roskear Shaft, Dolcoath Mine, Camborne, Cornwall, England, UK
31.0km (19.3 miles) ⓘCamborne Vean Mine (incl. New Dolcoath Mine), Camborne, Cornwall, England, UK
References
 
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