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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Quartz from
Stakholmen quarry, Hassela, Nordanstig, Gävleborg County, Sweden


Locality type:Quarry
Classification
Species:Quartz
Formula:SiO2
Formation:Primary
Comments:Jonsson (1996) says "In most of the investigated specimens, prismatine is intimately intergrown in a medium- to coarse-grained white or colourless to light tan mass mainly composed of subhedral sheaves of white enstatite, white, sheafy talc and a light brownish phlogopitic mica. Dravite, quartz and plagioclase occur as slightly less common constituents of this assemblage."
Abundance at site:Common
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Dravite3
Chondrodite2
Data
Mineral Data:Click here to view Quartz data
Locality Data:Click here to view Stakholmen quarry, Hassela, Nordanstig, Gävleborg County, Sweden
Data Identifiers
Mindat Occurrence Record ID:96606
Long-form Identifier:1:3:96606:1
GUID (UUID V4):0
Nearest other occurrences of Quartz
52.6km (32.7 miles) ⓘAlnö Complex, Sundsvall, Västernorrland County, Sweden
55.2km (34.3 miles) ⓘStolpås, Alnö Complex, Sundsvall, Västernorrland County, Sweden
66.8km (41.5 miles) ⓘEnåsen Mine, Ljusdal, Gävleborg County, Sweden
67.2km (41.8 miles) ⓘSnuggens copper mine, Ljusdal, Gävleborg County, Sweden
77.5km (48.2 miles) ⓘRäggen Pegmatite, Bräcke, Jämtland County, Sweden
77.8km (48.3 miles) ⓘJärkvissle, Sundsvall, Västernorrland County, Sweden
88.3km (54.9 miles) ⓘLos Cobalt Mines, Los, Ljusdal, Gävleborg County, Sweden
89.6km (55.7 miles) ⓘAbborrselet, Bräcke, Jämtland County, Sweden
92.2km (57.3 miles) ⓘHälleberget, Ragunda, Jämtland County, Sweden
92.3km (57.4 miles) ⓘMansjöberg Fe Mine, Los, Ljusdal, Gävleborg County, Sweden
References
Jonsson, E. (1996) The first occurrence of a kornerupine‐group mineral in Sweden: Prismatine from Stakholmen, Hälsingland. GFF, 118. 52-53 doi:10.1080/11035899609546333
Grew, Edward S.; Pertsev, Nikolai N.; Vrána, Stanislav; Yates, Martin G.; Shearer, Charles K.; Wiedenbeck, Michael (1998) Kornerupine parageneses in whiteschists and other magnesian rocks: is kornerupine + talc a high-pressure assemblage equivalent to tourmaline + orthoamphibole? Contributions to Mineralogy and Petrology, 131 (1). 22-38 doi:10.1007/s004100050376
 
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