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Tourmaline from
Sylvania Minerals (Great Lakes Aggregates Quarry; Sylvania Aggregates Quarry), South Rockwood, Monroe Co., Michigan, USA

Classification
Species:'Tourmaline' (not an IMA approved species)
Formula:A(D3)G6(Si6O18)(BO3)3X3Z
Confirmation
Validity:Believed Valid
References
References:Economic Geology of the Sand and Sandstone Resources of Michigan, E.W.Heinrich, Geological Survey Division Report of Investigation 21, 2001, Michigan Dept. of Environmental Quality
Data
Mineral Data:Click here to view Tourmaline data
Locality Data:Click here to view Sylvania Minerals (Great Lakes Aggregates Quarry; Sylvania Aggregates Quarry), South Rockwood, Monroe Co., Michigan, USA
Nearest other occurrences of Tourmaline
19.5km (12.1 miles) France Stone Co. Quarry, Monroe, Monroe Co., Michigan, USA
80.1km (49.7 miles) Napoleon Sandstone Quarry (Napoleon Stone Quarry), Jackson Co., Michigan, USA
 
Mineral and/or Locality  
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