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Island Mine, Alstead, Cheshire County, New Hampshire, USAi
Regional Level Types
Island MineMine
AlsteadTown
Cheshire CountyCounty
New HampshireState
USACountry

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PhotosMapsSearch
03933840017272028046662.jpg
Almandine, etc.

Island Mine, Alstead, Cheshire County, New Hampshire, USA
07658860017272028063044.jpg
Beryl, etc.

Island Mine, Alstead, Cheshire County, New Hampshire, USA
01819200017801749889414.jpg
Beryl, etc.

Island Mine, Alstead, Cheshire County, New Hampshire, USA
03933840017272028046662.jpg
Almandine, etc.

Island Mine, Alstead, Cheshire County, New Hampshire, USA
05691770017272028038888.jpg
Beryl, etc.

Island Mine, Alstead, Cheshire County, New Hampshire, USA
01819200017801749889414.jpg
Beryl, etc.

Island Mine, Alstead, Cheshire County, New Hampshire, USA
03933840017272028046662.jpg
Almandine, etc.

Island Mine, Alstead, Cheshire County, New Hampshire, USA
07658860017272028063044.jpg
Beryl, etc.

Island Mine, Alstead, Cheshire County, New Hampshire, USA
Latitude & Longitude (WGS84):
43° 4' 24'' North , 72° 16' 30'' West
Latitude & Longitude (decimal):
43.07353,-72.27523
GRN:
N29W39
Type:
Mine
Kรถppen climate type:
Dfb : Warm-summer humid continental climate
Nearest Settlements:
PlacePopulationDistance
Gilsum828 (2017)3.0km
Surry717 (2017)7.2km
Marlow796 (2017)7.9km
Sullivan795 (2017)8.0km
Alstead2,071 (2017)10.9km
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
ClubLocationDistance
Keene Mineral ClubKeene, New Hampshire16km
Mindat Locality ID:
9033
Long-form identifier:
mindat:1:2:9033:2
GUID (UUID V4):
0
Other/historical names associated with this locality:
Island Mica Mine


Granite pegmatite, Alstead field.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


8 valid minerals.

Detailed Mineral List:

โ“˜ Albite
Formula: Na(AlSi3O8)
โ“˜ Almandine
Formula: Fe2+3Al2(SiO4)3
โ“˜ Beryl
Formula: Be3Al2(Si6O18)
โ“˜ Beryl var. Aquamarine
โœช Beryl var. Goshenite
Formula: Be3Al2(Si6O18)
Description: gem quality
โœช Beryl var. Heliodor
Formula: Be3Al2(Si6O18)
โ“˜ 'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
โ“˜ Fluorapatite
Formula: Ca5(PO4)3F
โ“˜ Microcline
Formula: K(AlSi3O8)
โ“˜ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
โ“˜ Quartz
Formula: SiO2
โ“˜ Schorl
Formula: NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
โ“˜Quartz4.DA.05SiO2
Group 8 - Phosphates, Arsenates and Vanadates
โ“˜Fluorapatite8.BN.05Ca5(PO4)3F
Group 9 - Silicates
โ“˜Almandine9.AD.25Fe2+3Al2(SiO4)3
โ“˜Beryl
var. Aquamarine		9.CJ.05Be3Al2(Si6O18)
โ“˜9.CJ.05Be3Al2(Si6O18)
โ“˜var. Heliodor9.CJ.05Be3Al2(Si6O18)
โ“˜var. Goshenite9.CJ.05Be3Al2(Si6O18)
โ“˜Schorl9.CK.05NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)
โ“˜Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
โ“˜Microcline9.FA.30K(AlSi3O8)
โ“˜Albite9.FA.35Na(AlSi3O8)
Unclassified
โ“˜'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2

List of minerals for each chemical element

HHydrogen
Hโ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Hโ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Hโ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
BeBeryllium
Beโ“˜ BerylBe3Al2(Si6O18)
Beโ“˜ Beryl var. HeliodorBe3Al2(Si6O18)
Beโ“˜ Beryl var. GosheniteBe3Al2(Si6O18)
BBoron
Bโ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
OOxygen
Oโ“˜ AlbiteNa(AlSi3O8)
Oโ“˜ AlmandineFe32+Al2(SiO4)3
Oโ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Oโ“˜ BerylBe3Al2(Si6O18)
Oโ“˜ FluorapatiteCa5(PO4)3F
Oโ“˜ MicroclineK(AlSi3O8)
Oโ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Oโ“˜ QuartzSiO2
Oโ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Oโ“˜ Beryl var. HeliodorBe3Al2(Si6O18)
Oโ“˜ Beryl var. GosheniteBe3Al2(Si6O18)
FFluorine
Fโ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Fโ“˜ FluorapatiteCa5(PO4)3F
NaSodium
Naโ“˜ AlbiteNa(AlSi3O8)
Naโ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
MgMagnesium
Mgโ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
AlAluminium
Alโ“˜ AlbiteNa(AlSi3O8)
Alโ“˜ AlmandineFe32+Al2(SiO4)3
Alโ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Alโ“˜ BerylBe3Al2(Si6O18)
Alโ“˜ MicroclineK(AlSi3O8)
Alโ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Alโ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Alโ“˜ Beryl var. HeliodorBe3Al2(Si6O18)
Alโ“˜ Beryl var. GosheniteBe3Al2(Si6O18)
SiSilicon
Siโ“˜ AlbiteNa(AlSi3O8)
Siโ“˜ AlmandineFe32+Al2(SiO4)3
Siโ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Siโ“˜ BerylBe3Al2(Si6O18)
Siโ“˜ MicroclineK(AlSi3O8)
Siโ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Siโ“˜ QuartzSiO2
Siโ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Siโ“˜ Beryl var. HeliodorBe3Al2(Si6O18)
Siโ“˜ Beryl var. GosheniteBe3Al2(Si6O18)
PPhosphorus
Pโ“˜ FluorapatiteCa5(PO4)3F
KPotassium
Kโ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Kโ“˜ MicroclineK(AlSi3O8)
Kโ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
CaCalcium
Caโ“˜ FluorapatiteCa5(PO4)3F
TiTitanium
Tiโ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
FeIron
Feโ“˜ AlmandineFe32+Al2(SiO4)3
Feโ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Feโ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)

Other Regions, Features and Areas containing this locality

North AmericaContinent
North America PlateTectonic Plate

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

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 pp.125-127
Gosse, Ralph (1968): Notes on Rare and Unusual New England Gemstones (Rocks & Minerals 43:753)
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