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Island Mine, Alstead, Cheshire County, New Hampshire, USAi
Regional Level Types
Island MineMine
Alstead- not defined -
Cheshire CountyCounty
New HampshireState
USACountry

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Latitude & Longitude (WGS84):
43° 4' 35'' North , 72° 16' 39'' West
Latitude & Longitude (decimal):
43.07663,-72.27777
GeoHash:
G#: drst53bgt
GRN:
N29W39
Type:
Mine
KΓΆppen climate type:
Dfb : Warm-summer humid continental climate
Nearest Settlements:
PlacePopulationDistance
Gilsum828 (2017)3.4km
Surry717 (2017)7.4km
Marlow796 (2017)7.9km
Sullivan795 (2017)8.4km
Alstead2,071 (2017)10.5km
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):
4acc9dc6-7f7b-4688-870b-980768ed57ab
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


7 valid minerals.

Detailed Mineral List:

β“˜ Almandine
Formula: Fe2+3Al2(SiO4)3
β“˜ Beryl
Formula: Be3Al2(Si6O18)
β“˜ Beryl var. Aquamarine
Formula: Be3Al2Si6O18
βœͺ Beryl var. Goshenite
Formula: Be3Al2(Si6O18)
Description: gem quality
βœͺ Beryl var. Heliodor
Formula: Be3Al2(Si6O18)
β“˜ 'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
β“˜ Fluorapatite
Formula: Ca5(PO4)3F
β“˜ Microcline
Formula: K(AlSi3O8)
β“˜ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
β“˜ 'Plagioclase'
Formula: (Na,Ca)[(Si,Al)AlSi2]O8
β“˜ Quartz
Formula: SiO2
β“˜ Schorl
Formula: NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)

Gallery:

Be3Al2(Si6O18)β“˜ Beryl

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
β“˜Quartz4.DA.05SiO2
Group 8 - Phosphates, Arsenates and Vanadates
β“˜Fluorapatite8.BN.05Ca5(PO4)3F
Group 9 - Silicates
β“˜Almandine9.AD.25Fe2+3Al2(SiO4)3
β“˜Beryl
var. Aquamarine		9.CJ.05Be3Al2Si6O18
β“˜9.CJ.05Be3Al2(Si6O18)
β“˜var. Heliodor9.CJ.05Be3Al2(Si6O18)
β“˜var. Goshenite9.CJ.05Be3Al2(Si6O18)
β“˜Schorl9.CK.05NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)
β“˜Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
β“˜Microcline9.FA.30K(AlSi3O8)
Unclassified
β“˜'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
β“˜'Plagioclase'-(Na,Ca)[(Si,Al)AlSi2]O8

List of minerals for each chemical element

HHydrogen
Hβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Hβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Hβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
BeBeryllium
Beβ“˜ Beryl var. AquamarineBe3Al2Si6O18
Beβ“˜ BerylBe3Al2(Si6O18)
Beβ“˜ Beryl var. HeliodorBe3Al2(Si6O18)
Beβ“˜ Beryl var. GosheniteBe3Al2(Si6O18)
BBoron
Bβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
OOxygen
Oβ“˜ Beryl var. AquamarineBe3Al2Si6O18
Oβ“˜ AlmandineFe32+Al2(SiO4)3
Oβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Oβ“˜ BerylBe3Al2(Si6O18)
Oβ“˜ FluorapatiteCa5(PO4)3F
Oβ“˜ MicroclineK(AlSi3O8)
Oβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Oβ“˜ QuartzSiO2
Oβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Oβ“˜ Beryl var. HeliodorBe3Al2(Si6O18)
Oβ“˜ Beryl var. GosheniteBe3Al2(Si6O18)
Oβ“˜ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
FFluorine
Fβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Fβ“˜ FluorapatiteCa5(PO4)3F
NaSodium
Naβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Naβ“˜ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
MgMagnesium
Mgβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
AlAluminium
Alβ“˜ Beryl var. AquamarineBe3Al2Si6O18
Alβ“˜ AlmandineFe32+Al2(SiO4)3
Alβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Alβ“˜ BerylBe3Al2(Si6O18)
Alβ“˜ MicroclineK(AlSi3O8)
Alβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Alβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Alβ“˜ Beryl var. HeliodorBe3Al2(Si6O18)
Alβ“˜ Beryl var. GosheniteBe3Al2(Si6O18)
Alβ“˜ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
SiSilicon
Siβ“˜ Beryl var. AquamarineBe3Al2Si6O18
Siβ“˜ AlmandineFe32+Al2(SiO4)3
Siβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Siβ“˜ BerylBe3Al2(Si6O18)
Siβ“˜ MicroclineK(AlSi3O8)
Siβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Siβ“˜ QuartzSiO2
Siβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Siβ“˜ Beryl var. HeliodorBe3Al2(Si6O18)
Siβ“˜ Beryl var. GosheniteBe3Al2(Si6O18)
Siβ“˜ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
PPhosphorus
Pβ“˜ FluorapatiteCa5(PO4)3F
KPotassium
Kβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Kβ“˜ MicroclineK(AlSi3O8)
Kβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
CaCalcium
Caβ“˜ FluorapatiteCa5(PO4)3F
Caβ“˜ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
TiTitanium
Tiβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
FeIron
Feβ“˜ AlmandineFe32+Al2(SiO4)3
Feβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Feβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)

Other Regions, Features and Areas containing this locality

North America PlateTectonic Plate

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References

Cameron, Eugene N., , (1954) Pegmatite investigations, 1942-45, in New England. 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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