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


08208420017272036425471.jpg
Muscovite

Palermo No. 1 Mine, Groton, Grafton County, New Hampshire, USA
09468560017272017117658.jpg
Muscovite, etc.

Palermo No. 1 Mine, Groton, Grafton County, New Hampshire, USA
08522530017272017092960.jpg
Muscovite

Palermo No. 1 Mine, Groton, Grafton County, New Hampshire, USA
03306100017272017131396.jpg
Muscovite

Palermo No. 1 Mine, Groton, Grafton County, New Hampshire, USA
08208420017272036425471.jpg
Muscovite

Palermo No. 1 Mine, Groton, Grafton County, New Hampshire, USA
09468560017272017117658.jpg
Muscovite, etc.

Palermo No. 1 Mine, Groton, Grafton County, New Hampshire, USA
08522530017272017092960.jpg
Muscovite

Palermo No. 1 Mine, Groton, Grafton County, New Hampshire, USA
03306100017272017131396.jpg
Muscovite

Palermo No. 1 Mine, Groton, Grafton County, New Hampshire, USA
01287480017272036466048.jpg
Muscovite

Palermo No. 1 Mine, Groton, Grafton County, New Hampshire, USA
09064650017272017141805.jpg
Muscovite, etc.

Palermo No. 1 Mine, Groton, Grafton County, New Hampshire, USA
08522530017272017092960.jpg
Muscovite

Palermo No. 1 Mine, Groton, Grafton County, New Hampshire, USA
03306100017272017131396.jpg
Muscovite

Palermo No. 1 Mine, Groton, Grafton County, New Hampshire, USA
Locality type:Mine
Classification
Species:Muscovite
Formula:KAl2(AlSi3O10)(OH)2
Habit:Books up to 4 feet in diameter and 2 feet thick were found
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Quartz14
- var Smoky Quartz1
Albite13
- var Cleavelandite3
Scorzalite6
Meta-autunite5
Uraninite4
Beryl4
- var Heliodor1
Fluorapatite3
Schorl1
Microcline1
Siderite1
Mitridatite1
Data
Mineral Data:Click here to view Muscovite data
Locality Data:Click here to view Palermo No. 1 Mine, Groton, Grafton County, New Hampshire, USA
Photo GalleryView Gallery (18 photos)
Data Identifiers
Mindat Occurrence Record ID:27992
Long-form Identifier:1:3:27992:9
GUID (UUID V4):0
Nearest other occurrences of Muscovite
0.3km (0.2 miles) ⓘPalermo No. 2 Mine, Groton, Grafton County, New Hampshire, USA
0.9km (0.6 miles) ⓘRice Quarry, Groton, Grafton County, New Hampshire, USA
1.4km (0.9 miles) ⓘCharles Davis Mine, Groton, Grafton County, New Hampshire, USA
5.1km (3.2 miles) ⓘFletcher Mine, Groton, Grafton County, New Hampshire, USA
6.8km (4.2 miles) ⓘKeniston mica prospect, Rumney, Grafton County, New Hampshire, USA
7.2km (4.5 miles) ⓘAtwood Mine, Rumney, Grafton County, New Hampshire, USA
7.5km (4.7 miles) ⓘNo. 3 pit, Keyes Mica Quarries, Orange, Grafton County, New Hampshire, USA
7.8km (4.8 miles) ⓘKeyes Mica Quarries, Orange, Grafton County, New Hampshire, USA
7.8km (4.8 miles) ⓘNo. 1 pit, Keyes Mica Quarries, Orange, Grafton County, New Hampshire, USA
7.9km (4.9 miles) ⓘBelden Mine, Rumney, Grafton County, New Hampshire, 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
Korzeb, Stanley L., Foord, Eugene E., Lichte, Frederick E. (1997) The chemical evolution and paragenesis of uranium minerals from the Ruggles and Palermo granitic pegmatites, New Hampshire. The Canadian Mineralogist: 35(1): 135-144.
Dallaire, Donald (2022) Beryllium Minerals in New Hampshire. Rocks & Minerals, 97 (3) 208-235 doi:10.1080/00357529.2022.2028096
 
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