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Morefield Mine (Morefield pegmatite), Winterham, Amelia Co., Virginia, USA

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Mine owner Sam Dunaway with pegmatite

Morefield Mine, Winterham, Amelia Co., Virginia, USA
Face of vertical pegmatite before diabase dike

Morefield Mine, Winterham, Amelia Co., Virginia, USA
Mine owner Sam Dunaway with pegmatite

Morefield Mine, Winterham, Amelia Co., Virginia, USA
Face of vertical pegmatite before diabase dike

Morefield Mine, Winterham, Amelia Co., Virginia, USA
 

List of minerals arranged by Dana 8th Edition classification
Group 1 - NATIVE ELEMENTS AND ALLOYS
Metals, other than the Platinum Group
Lead1.1.1.4Pb
Group 2 - SULFIDES
AmXp, with m:p = 1:1
Galena2.8.1.1PbS
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 1:2
Molybdenite2.12.10.1MoS2
Pyrite2.12.1.1FeS2
Group 4 - SIMPLE OXIDES
A2X3
Ilmenite4.3.5.1Fe2+TiO3
AX2
Cassiterite4.4.1.5SnO2
Pyrolusite ?4.4.1.4MnO2
Rutile4.4.1.1TiO2
Group 5 - OXIDES CONTAINING URANIUM OR THORIUM
AXO2·xH2O
Uraninite5.1.1.1UO2
Group 7 - MULTIPLE OXIDES
AB2X4
Chrysoberyl7.2.9.1BeAl2O4
AB8X16
Hollandite7.9.1.1Ba(Mn4+6Mn3+2)O16
Group 8 - MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
ABO4
Samarskite-(Y)8.1.11.1(Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8
A2B2O6(O,OH,F)
Microlite Group8.2.2.1
AB2O6
Columbite-(Fe)8.3.2.2FeNb2O6
Euxenite-(Y)8.3.8.2(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
Tantalite-(Mn)8.3.2.3MnTa2O6
Group 9 - NORMAL HALIDES
AX2
Fluorite9.2.1.1CaF2
Group 11 - HALIDE COMPLEXES
Aluminofluorides - Isolated Octahedra
Chiolite11.6.11.1Na5Al3F14
Cryolite11.6.1.1Na2NaAlF6
Elpasolite11.6.2.1K2NaAlF6
Gearksutite11.6.8.1Ca[Al(F,OH)5(H2O)]
Hydrokenoralstonite11.6.12.1 Na0.5(Al,Mg)2(F,OH)6•H2O
Pachnolite11.6.5.1NaCa[AlF6] · H2O
Prosopite11.6.9.1CaAl2(F,OH)8
Thomsenolite11.6.6.1NaCa[AlF6] · H2O
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Cerussite14.1.3.4PbCO3
Group 16a - ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
Bismutite16a.3.5.1(BiO)2CO3
Group 25 - ANHYDROUS BORATES CONTAINING HYDROXYL OR HALOGEN
Diborates
Sussexite25.2.1.1Mn2+BO2(OH)
Group 40 - HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
AB2(XO4)2·xH2O
Phosphophyllite40.2.7.1Zn2Fe(PO4)2 · 4H2O
(AB)5(XO4)2·xH2O
Brockite40.4.7.5(Ca,Th,Ce)PO4 · H2O
Phosphosiderite40.4.3.2FePO4 · 2H2O
Strengite40.4.1.2FePO4 · 2H2O
Group 41 - ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
A2(XO4)Zq
Triplite41.6.1.2(Mn2+,Fe2+)2(PO4)(F,OH)
A5(XO4)3Zq
Fluorapatite41.8.1.1Ca5(PO4)3F
Pyromorphite41.8.4.1Pb5(PO4)3Cl
Group 42 - HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
(AB)5(XO4)2Zq·xH2O
Phosphuranylite42.4.8.1(H3O)3KCa(UO2)7(PO4)4O4 · 8H2O
A2(XO4)Zq·xH2O
Fluellite42.6.9.1Al2(PO4)F2(OH) · 7H2O
(AB)2(XO4)Zq·xH2O
Goyazite42.7.3.3SrAl3(PO4)(PO3OH)(OH)6
(AB)3(XO4)2Zq·xH2O
Bermanite42.11.17.1Mn2+Mn3+2(PO4)2(OH)2 · 4H2O
Group 50 - ORGANIC COMPOUNDS
Oxalates
Weddellite50.1.2.1Ca(C2O4) · (2.5-x)H2O
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in [4] coordination
Phenakite51.1.1.1Be2SiO4
Insular SiO4 Groups Only with cations in [6] and >[6] coordination
Almandine51.4.3a.2Fe2+3Al2(SiO4)3
Andradite ?51.4.3b.1Ca3Fe3+2(SiO4)3
Spessartine51.4.3a.3Mn2+3Al2(SiO4)3
Insular SiO4 Groups Only with cations in >[6] coordination
'Thorogummite'51.5.2.5(Th,U)(SiO4)1-x(OH)4x
Zircon51.5.2.1Zr(SiO4)
Group 52 - NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
Insular SiO4 Groups and O, OH, F, and H2O with cations in [4] and >[4] coordination
Euclase52.2.1.1BeAl(SiO4)(OH)
Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] coordination only
Topaz52.3.1.1Al2(SiO4)(F,OH)2
Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] and/or >[6] coordination
Titanite52.4.3.1CaTi(SiO4)O
Group 56 - SOROSILICATES Si2O7 Groups, With Additional O, OH, F and H2O
Si2O7 Groups and O, OH, F, and H2O with cations in [4] coordination
Bertrandite56.1.1.1Be4(Si2O7)(OH)2
Group 58 - SOROSILICATES Insular, Mixed, Single, and Larger Tetrahedral Groups
Insular, Mixed, Single, and Larger Tetrahedral Groups with cations in [6] and higher coordination; single and double groups (n = 1, 2)
Allanite-(Ce)58.2.1a.1{CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
Group 61 - CYCLOSILICATES Six-Membered Rings
Six-Membered Rings with [Si6O18] rings; possible (OH) and Al substitution
Beryl61.1.1.1Be3Al2(Si6O18)
Six-Membered Rings with borate groups
Schorl61.3.1.10Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=2
Spodumene65.1.4.1LiAlSi2O6
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Masutomilite71.2.2b.12(K,Rb)(Li,Mn3+,Al)3(AlSi3O10)(F,OH)2
Muscovite71.2.2a.1KAl2(AlSi3O10)(OH)2
Phlogopite ?71.2.2b.1KMg3(AlSi3O10)(OH)2
'Zinnwaldite'71.2.2b.10KLiFe2+Al(AlSi3O10)(F,OH)2
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Si Tetrahedral Frameworks - SiO2 with H2O and organics
Opal75.2.1.1SiO2 · nH2O
Group 76 - TECTOSILICATES Al-Si Framework
Al-Si Framework with Al-Si frameworks
Albite76.1.3.1Na(AlSi3O8)
Microcline76.1.1.5K(AlSi3O8)
Orthoclase ?76.1.1.1K(AlSi3O8)
Al-Si Framework Feldspathoids and related species
Helvine76.2.4.1Be3Mn2+4(SiO4)3S
Unclassified Minerals
Albite
var: Cleavelandite
-Na(AlSi3O8)
Anorthite-Ca(Al2Si2O8)
'Apatite'-Ca5(PO4)3X
Beryl
var: Aquamarine
-Be3Al2Si6O18
var: Goshenite-Be3Al2(Si6O18)
'Biotite'-
Ferro-hornblende-☐{Ca2}{Fe2+4Al}(AlSi7O22)(OH)2
Fluorite
var: Chlorophane
-CaF2
Kaolinite-Al2(Si2O5)(OH)4
'Labradorite'-(Ca,Na)[Al(Al,Si)Si2O8]
Lindbergite-Mn2+(C2O4) · 2H2O
Microcline
var: Amazonite
-K(AlSi3O8)
'Monazite'-(Ce,La,Nd,Th,Y,Dy,Sm)(PO4)
'Moonstone'-
Muscovite
var: Leverrierite
-KAl2(AlSi3O10)(OH)2
var: Sericite-KAl2(AlSi3O10)(OH)2
Opal
var: Opal-AN
-SiO2 · nH2O
Quartz
var: Agate
-SiO2
var: Rock Crystal-SiO2
var: Smoky Quartz-SiO2
Serrabrancaite-MnPO4 · H2O
'Tourmaline'-A(D3)G6(T6O18)(BO3)3X3Z

References

Rocks & Minerals (1933): 8: 143-144.

USGS Bulletin 248B (1952).

Brown, W.R. (1962) Mica and Feldspar Deposits of Virginia.

Penick, D. Allen, Jr. (1985): Virginia Mineral Locality Index. Rocks and Minerals: 60(4): 165.

Sweet, P.C. and Penick, D.A., Jr. (1986), Morefield Pegmatite Mine Reopens - Virginia's only Active Underground Gem Mine.

Kearns, Lance E. (1993), Minerals of the Morefield Pegmatite, Amelia County, Virginia. Rocks & Minerals: 68(4): 232-242.

Kearns, Lance E. (1995), Alumino-fluorides from the Morefield pegmatite, Amelia County, Virginia. Mineralogical Record: 26(6): 551-556.

O’Neill, K. A.; Nowak, B. A.; Johnson, C. B.; Kearns, L. E. (1996), Contributed Papers in Specimen Mineralogy: 22nd Rochester Mineralogical Symposium, Mineral Chemistry of Micas and Amazonite: The Morefield Pegmatite, Amelia, Virginia. Rocks & Minerals: 71(3): 198-199.

Virginia Minerals, Virginia Division of Mineral Resources, Charlottesville, Virginia: 32(2).

Virginia Division of Mineral Resources Report 3, Charlottesville, Virginia: 59-60, 61-94.

Virginia Geologic Survey Bulletin 33.

Virginia Minerals, Vol. 46.

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