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Opal from
Holzbrücken mill, Ingering valley, Knittelfeld, Styria, Austria

Classification
Species:Opal
Formula:SiO2 · nH2O
Confirmation
Validity:Believed Valid
References
References:R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993)
Data
Mineral Data:Click here to view Opal data
Locality Data:Click here to view Holzbrücken mill, Ingering valley, Knittelfeld, Styria, Austria
Nearest other occurrences of Opal
38.7km (24.1 miles) Schwarzenberg quarry, Katsch an der Mur, Murau, Styria, Austria
42.1km (26.1 miles) Stoffhütte, St Oswald, Deutschlandsberg, Koralpe, Styria, Austria
46.8km (29.1 miles) Spodumene prospect (Brandrücken exploration adit; Weinebene deposit), Brandrücken, Moschkogel - Weinebene area, Koralpe, Carinthia, Austria
47.6km (29.6 miles) S6 motorway tunnel (Tanzenberg tunnel), Tanzenberg, Kapfenberg, Bruck an der Mur, Styria, Austria
51.7km (32.1 miles) Schwagbauer (Schwoagbauer), Osterwitz, Deutschlandsberg, Koralpe, Styria, Austria
54.1km (33.6 miles) Müllerbauer, Schwarze Sulm, Schwanberg, Koralpe, Styria, Austria
55.2km (34.3 miles) Rostock creek, Trahütten, Deutschlandsberg, Koralpe, Styria, Austria
61.1km (38.0 miles) Hartner quarry, Schwanberg, Koralpe, Styria, Austria
63.1km (39.2 miles) Basalt quarry, Weitendorf, Wildon, Graz, Styria, Austria
64.2km (39.9 miles) Polanz quarry (Mauthnereck), Krumbach, Sankt Oswald ob Eibiswald, Eibiswald, Koralpe, Styria, Austria
 
Mineral and/or Locality  
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