Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Sillimanite from
Chandlers Mill Quarry, Newport, Sullivan County, New Hampshire, USA


Locality type:Quarry
Classification
Species:Sillimanite
Formula:Al2(SiO4)O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Sillimanite data
Locality Data:Click here to view Chandlers Mill Quarry, Newport, Sullivan County, New Hampshire, USA
Data Identifiers
Mindat Occurrence Record ID:654196
Long-form Identifier:1:3:654196:5
GUID (UUID V4):0
Nearest other occurrences of Sillimanite
0.1km (0.1 miles) ⓘGeorge Frank Smith Quarry, Newport, Sullivan County, New Hampshire, USA
28.7km (17.8 miles) ⓘFall Mountain, Walpole, Cheshire County, New Hampshire, USA
29.4km (18.3 miles) ⓘBellows Falls, Rockingham, Windham County, Vermont, USA
31.5km (19.6 miles) ⓘBurroughs beryl prospect, Alstead, Cheshire County, New Hampshire, USA
31.8km (19.8 miles) ⓘFrench Mine, Alstead, Cheshire County, New Hampshire, USA
32.7km (20.3 miles) ⓘNichols Quarry, Gilsum, Cheshire County, New Hampshire, USA
33.4km (20.8 miles) ⓘRuggles Mine, Grafton, Grafton County, New Hampshire, USA
34.0km (21.1 miles) ⓘKirk No. 2 Quarry, Gilsum, Cheshire County, New Hampshire, USA
41.2km (25.6 miles) ⓘStandard Mine, Orange, Grafton County, New Hampshire, USA
42.0km (26.1 miles) ⓘOsgood Graphite Mine, Nelson, Cheshire County, New Hampshire, USA
References
Cameron, Eugene N., Larrabee, David M., McNair, Andrew H., Page, James J., Stewart, Glen W., Shainin, Vincent E. (1954) Pegmatite Investigations, 1942-45, in New England. Geological Survey Professional Paper 255. US Geological Survey doi:10.3133/pp255
 
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