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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Helvine from
Breigangen Mine, Fossum Iron Mines, Skien, Telemark, Norway


Locality type:Mine
Classification
Species:Helvine
Formula:Be3Mn42+(SiO4)3S
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Helvine data
Locality Data:Click here to view Breigangen Mine, Fossum Iron Mines, Skien, Telemark, Norway
Data Identifiers
Mindat Occurrence Record ID:347239
Long-form Identifier:1:3:347239:2
GUID (UUID V4):0
Nearest other occurrences of Helvine
14.4km (9.0 miles) ⓘRamsåskollen, Skien, Telemark, Norway
14.8km (9.2 miles) ⓘBuer, Bjørkedalen, Porsgrunn, Telemark, Norway
16.4km (10.2 miles) ⓘKjølsrød, Bjørkedalen, Porsgrunn, Telemark, Norway
17.5km (10.9 miles) ⓘE18 roadcuts, Slevolden, Porsgrunn, Telemark, Norway
18.5km (11.5 miles) ⓘRønningen E 18 roadcuts, Porsgrunn, Telemark, Norway
21.1km (13.1 miles) ⓘKokkersvold, Kokkersvold - Blåfjell E18 roadcuts, Langangen, Porsgrunn, Telemark, Norway
22.2km (13.8 miles) ⓘChiavennite dike, Blåfjell (E18 roadcuts), Kokkersvold - Blåfjell E18 roadcuts, Langangen, Porsgrunn, Telemark, Norway
26.4km (16.4 miles) ⓘFerry Quay, Bjørkøya, Porsgrunn, Telemark, Norway
26.7km (16.6 miles) ⓘEikevegåsen Quarry, Bassebu, Porsgrunn, Telemark, Norway
27.7km (17.2 miles) ⓘSagåsen Quarry, Sagåsen, Auenlandet, Porsgrunn, Telemark, Norway
References
Larsen, Alf Olav (1988) Helvin fra Breigangen gruve, Fossum ved Skien [Helvite from Breigangen mine, Fossum at Skien]. Mineralogisk-Geologisk Museum - Universitetet i Oslo- Interne notater, Geologisk Museums venner. 130
Larsen, Alf Olav (1993) Fossum jernverk, in Telemark I. STEIN. Nordisk magasin for populær geologi, 20 (2) 112-116
 
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