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Opal from
Långban Mine, Långban Ore District, Filipstad, Värmland County, Sweden


Locality type:Mine
Classification
Species:Opal
Formula:SiO2 · nH2O
Comments:Flink's unknown #75, a reddish brown coating on impure gray marble with botryoids up to 1 mm, is identi
fied as opal, yielding a tridymite X-ray pattern) Metropolis (1988).
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Opal data
Locality Data:Click here to view Långban Mine, Långban Ore District, Filipstad, Värmland County, Sweden
Data Identifiers
Mindat Occurrence Record ID:54231
Long-form Identifier:1:3:54231:1
GUID (UUID V4):0
Nearest other occurrences of Opal
9.3km (5.8 miles) ⓘJakobsberg Mine, Jakobsberg ore field, Nordmark mining district, Filipstad, Värmland County, Sweden
43.6km (27.1 miles) ⓘRökärrs Mine, Timansberg, Nora, Örebro County, Sweden
References
Metropolis, W.C. (1988) Two Flink unknowns from Långban identified, in Contributed Papers in Specimen Mineralogy: 15th Rochester Mineralogical Symposium. Rocks & Minerals, 63 (6). 456 doi:10.1080/00357529.1988.11761882Flink Unknown #75
Holtstam, Dan, Langhof, Jörgen - Eds. (1999) Långban - The mines, their minerals, geology and explorers. Raster Förlag; Swedish Museum of Natural History, Stockholm. p.1-216.p.150
 
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