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Tourmaline from
Great Ring Farm, Newtown, Fairfield County, Connecticut, USA

Locality type:Farm
Classification
Species:'Tourmaline' (not an IMA approved species)
Formula:A(D3)G6(Si6O18)(BO3)3X3Z
Comments:Described in Dana and Brush (1875) as "perfect dark brown crystals in mica-slate...sometimes to two inches in length and breadth." These dark brown to black crystals are sometimes referred to in old literature as dravite, though that identification is unconfirmed.
Habit:short prismatic, doubly-terminated by rhombohedrons
Colour:dark brown to black, black
Quality for species:Good crystals or rich for species - important (!)
Confirmation
Validity:Believed Valid
References
References:Harold Moritz collection; Labels from Earl Sullivan collection; Dana and Brush (1875): A System of Mineralogy. Fifth edition. p.369
Data
Mineral Data:Click here to view Tourmaline data
Locality Data:Click here to view Great Ring Farm, Newtown, Fairfield County, Connecticut, USA
Photo GalleryView Gallery (4 photos)
Nearest other occurrences of Tourmaline
7.7km (4.8 miles) Curtis Quarry (Southford Quarry; Southford pegmatite; Southbury rose quartz quarry; Bridgeport Woodfinishing Co. Quarry; Hulls Hill), Southford, Southbury, New Haven Co., Connecticut, USA
9.6km (6.0 miles) Captain Cook's Quarry (Purdy Station Quarry), Newtown, Fairfield County, Connecticut, USA
11.0km (6.8 miles) Old Mine Plaza construction site, Long Hill, Trumbull, Fairfield County, Connecticut, USA
11.2km (7.0 miles) Old Mine Park (Old Tungsten Mine), Long Hill, Trumbull, Fairfield County, Connecticut, USA
14.7km (9.1 miles) Green's Farm locality (Roxbury garnet mine; Roxbury Falls garnet mine; Garnet Hill), Roxbury, Litchfield Co., Connecticut, USA
16.0km (9.9 miles) U. S. Route 7 Expressway (Danbury line to Iron Works District), Brookfield, Fairfield County, Connecticut, USA
16.6km (10.3 miles) Redding (Reading), Fairfield County, Connecticut, USA
19.4km (12.0 miles) Danburite type locality, Danbury, Fairfield County, Connecticut, USA
19.7km (12.2 miles) North Street mall, Danbury, Fairfield County, Connecticut, USA
21.1km (13.1 miles) Woodbury pegmatite quarry, Woodbury, Litchfield Co., Connecticut, USA
 
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