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Case Quarries, Portland, Middlesex Co., Connecticut, USA

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List of minerals arranged by Strunz 10th Edition classification


Group 2 - Sulphides and Sulfosalts
Bismuthinite2.DB.05Bi2S3
Chalcopyrite2.CB.10aCuFeS2
Cuprobismutite2.JA.10aCu8AgBi13S24
'Pyrite'2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
Bismite4.CB.60Bi2O3
Columbite-(Fe)4.DB.35FeNb2O6
Goethite4.00.α-Fe3+O(OH)
Liandratite4.DH.35U(Nb,Ta)2O8
Opal4.DA.10SiO2 · nH2O
var: Opal-AN4.DA.10SiO2 · nH2O
'Petscheckite' ?4.DH.35UFe(Nb,Ta)2O8
'Pyrolusite' ?4.DB.05MnO2
'Quartz'4.DA.05SiO2
var: Milky Quartz4.DA.05SiO2
var: Smoky Quartz4.DA.05SiO2
'Samarskite-(Y)'4.DB.25(Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8
Uraninite4.DL.05UO2
Uranpyrochlore (of Hogarth 1977)4.DH.15(U,Ca,Ce)2(Nb,Ta)2O6(OH,F)
Group 5 - Nitrates and Carbonates
Bismutite5.BE.25(BiO)2CO3
Group 8 - Phosphates, Arsenates and Vanadates
Autunite8.EB.05Ca(UO2)2(PO4)2 · 11H2O
Fluorapatite8.BN.05Ca5(PO4)3F
var: Mn-bearing Fluorapatite8.BN.05(Ca,Mn2+)5(PO4)3(F,Cl,OH) or Ca5([P,Mn5+]O4)3(F,Cl,OH)
'Meta-autunite'8.EB.10Ca(UO2)2(PO4)2 · 6-8H2O
'Metatorbernite'8.EB.10Cu(UO2)2(PO4)2 · 8H2O
Monazite-(Ce)8.AD.50Ce(PO4)
'Phosphuranylite'8.EC.10(H3O)3KCa(UO2)7(PO4)4O4 · 8H2O
Torbernite8.EB.05Cu(UO2)2(PO4)2 · 12H2O
Group 9 - Silicates
'Albite'9.FA.35Na(AlSi3O8)
'Almandine'9.AD.25Fe2+3Al2(SiO4)3
'Annite'9.EC.20KFe2+3(AlSi3O10)(OH)2
Beryl9.CJ.05Be3Al2(Si6O18)
var: Aquamarine9.CJ.05Be3Al2Si6O18
var: Heliodor9.CJ.05Be3Al2(Si6O18)
Bismutoferrite9.ED.25Fe3+2Bi(SiO4)2(OH)
Cordierite9.CJ.10(Mg,Fe)2Al3(AlSi5O18)
Epidote9.BG.05a{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
'Microcline'9.FA.30K(AlSi3O8)
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
Orthoclase ?9.FA.30K(AlSi3O8)
'Schorl'9.CK.05Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Spessartine ?9.AD.25Mn2+3Al2(SiO4)3
Uranophane9.AK.15Ca(UO2)2(SiO3OH)2 · 5H2O
Zircon9.AD.30Zr(SiO4)
var: Cyrtolite9.AD.30Zr[(SiO4),(OH)4]
Unclassified Minerals, Rocks, etc.
Feldspar Group-
'var: Perthite'-
Hornblende-
Limonite-(Fe,O,OH,H2O)
'Manganese Oxides'-
'var: Manganese Dendrites'-
Tantalite ?-(Mn,Fe)(Ta,Nb)2O6
Thorogummite-(Th,U)(SiO4)1-x(OH)4x

References

Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Boos, M. F., E. E. Maillot and McHenry Mosier. (1949), Investigation of Portland Beryl-Mica District, Middlesex County, Conn. US Bureau of Mines Report of Investigation 4425.
Cameron, Eugene N., Larrabee David M., McNair, Andrew H., Page, James T., Stewart, Glenn W., and Shainin, Vincent E. (1954), Pegmatite Investigations 1942-45 New England. USGS Professional Paper 255.
Schooner, Richard. (1955): 90 Minerals from 1 Connecticut Hill. Rocks & Minerals: 30(7-8): 351-8.
Schooner, Richard. (1958), The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough). Published by Richard Schooner; Ralph Lieser of Pappy’s Beryl Shop, East Hampton; and Howard Pate of Fluorescent House, Branford, Connecticut.
Stugard, Frederick, Jr. (1958), Pegmatites of the Middletown Area, Connecticut. USGS Bulletin 1042-Q.
Jones, Robert W., Jr. (1960), Luminescent Minerals of Connecticut, A Guide to Their Properties and Locations. Fluorescent House. Branford, Connecticut.
Schooner, Richard. (1961), The Mineralogy of Connecticut. Fluorescent House, Branford, Connecticut.
Ryerson, Kathleen. (1972): Rock Hound's Guide to Connecticut. Pequot Press.
Webster, Bud. (1978), Mineral Collector’s Field Guide Connecticut. Privately published.
Albini, Anthony J. (1979), Selected Pegmatite Quarries of the Central Connecticut Region. Masters thesis.
Webster, Bud and Bill Shelton. (1979), Mineral Collector’s Field Guide the Northeast.
Cross, L. M. (1987), A New Occurrence of Beryl at Case Quarries, Portland, Connecticut. Rocks & Minerals: 62(2): 116-7.
Robinson, George W. and Vandall T. King. (1988), What's New in Minerals? Mineralogical Record: 19(5): 332.
Weber, Marcelle H. and Earle C. Sullivan. (1995), Connecticut Mineral Locality Index. Rocks & Minerals (Connecticut Issue): 70(6): 403.
Huff, R. C., R. G. Huff, J. Vajdak. (1996), An Occurrence of Bismutoferrite in Portland, Connecticut. Rocks & Minerals: 71(3): 197.
Vajdak, Josef. (1997), New Mineral Finds in 1996, News from Vajdak of Pequa Rare Minerals and Metals. Mineral News: 13:(3): 1,4,5.
Davis, Fred E. (2000), June 17th Field Trip: Case Prospects. Triassic Valley Bulletin, New Haven Mineral Club.

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