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Orthoclase from
Venturinha, Sezures, Penalva do Castelo, Viseu, Portugal

Classification
Species:Orthoclase
Formula:K(AlSi3O8)
Confirmation
Validity:Believed Valid
References
References:Correia Neves, J.M. (1964): Contributions to Mineralogy and Petrology 10, 357-373.
Associated Minerals Based on Photo Data:
Beryl1 photo of Orthoclase associated with Beryl at this locality.
Data
Mineral Data:Click here to view Orthoclase data
Locality Data:Click here to view Venturinha, Sezures, Penalva do Castelo, Viseu, Portugal
Nearest other occurrences of Orthoclase
5.1km (3.2 miles) Corfel Mine, Vila Longa, Sátão, Viseu, Portugal
9.1km (5.6 miles) Real quarry, Real, Penalva do Castelo, Viseu, Portugal
10.4km (6.5 miles) Nossa Senhora da Esperança quarry, Quintela de Azurara, Mangualde, Viseu, Portugal
24.7km (15.4 miles) Repeses, Viseu, Viseu, Portugal
50.3km (31.2 miles) Bendada Mines, Bendada, Sabugal, Guarda, Portugal
52.1km (32.4 miles) Penalobo (or Pena Lobo), Sabugal, Guarda, Portugal
55.2km (34.3 miles) Castanheira, Albergaria da Serra, Arouca, Aveiro, Portugal
64.1km (39.8 miles) Portugal No. 2 quarry, Malpartida, Almeida, Guarda, Portugal
74.6km (46.3 miles) Pópulo, Alijó, Vila Real, Portugal
 
Mineral and/or Locality  
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