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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Cyrtolite from
Palermo No. 1 Mine, Groton, Grafton County, New Hampshire, USA


05376870017363447798660.jpg
Cyrtolite

Palermo No. 1 Mine, Groton, Grafton County, New Hampshire, USA
05376870017363447798660.jpg
Cyrtolite

Palermo No. 1 Mine, Groton, Grafton County, New Hampshire, USA
08335760017272039266856.jpg
Cyrtolite

Palermo No. 1 Mine, Groton, Grafton County, New Hampshire, USA
Locality type:Mine
Classification
Species:Zircon var: Cyrtolite
Formula:Zr[(SiO4),(OH)4]
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Cyrtolite data
Locality Data:Click here to view Palermo No. 1 Mine, Groton, Grafton County, New Hampshire, USA
Data Identifiers
Mindat Occurrence Record ID:147209
Long-form Identifier:1:3:147209:7
GUID (UUID V4):0
Nearest other occurrences of Cyrtolite
71.3km (44.3 miles) ⓘBeryl Mountain Quarry, South Acworth, Acworth, Sullivan County, New Hampshire, USA
71.4km (44.4 miles) ⓘHam and Weeks Mine, Wakefield, Carroll County, New Hampshire, USA
77.9km (48.4 miles) ⓘParker Mountain Mine, Strafford, Strafford County, New Hampshire, USA
84.2km (52.3 miles) ⓘChickering Mine, Walpole, Cheshire County, New Hampshire, USA
91.5km (56.9 miles) ⓘLord Hill Quarry (Lord Hill Mine), Stoneham, Oxford County, Maine, USA
References
USGS Prof Paper 353
Verrow, Harold J. (1941) Pegmatite minerals of the Palermo quarry, North Groton, New Hampshire. Rocks & Minerals, 16 (6) 208-211
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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