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2012 Bmc Auction Specimens

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A SAMPLER OF SELECTED 2017 BMC AUCTION SPECIMENS (2017 Auction Date is Saturday, 21 January) Volume 3 3+ Hematite [Fe 2O3] & Quartz [SiO2] Locality Cleator Moor Iron Mines Cleator Moor West Cumberland Iron Field Cumbria, England, UK Size 13.5 x 9.5 x 7.0 cm 1498 g Donated by Stonetrust Hematite Crystal System: Trigonal Photograph by Mike Haritos Physical Properties Transparency: Subtranslucent to opaque Mohs hardness: 6.5 Density: approx 5.3 gm/cm3 Streak: Red Luster: Metalic Vanadinite [Pb5(VO4)3Cl] var. Endlichite Locality Erupción Mine (Ahumada Mine) Los Lamentos Mountains (Sierra de Los Lamentos) Mun. de Ahumada Chihuahua, Mexico Size 12.0 x 9.5 x 7.0 cm 1134 g Donated by Stonetrust Crystal System: Hexagonal Physical Properties Transparency: Subtranslucent to opaque Mohs hardness: 3.5-4 Photograph by Mike Haritos Density: 6.8 to 7.1 gm/cm3 Streak: Brownish yellow Endlichite, Pb5([V, As]O4)3Cl, is the arsenic rich Luster: Adamantine variety of vanadinite with arsenic atoms (As) substituting for some of the vanadium (V) 2+ Dolomite [CaMg(CO3)2] & Chalcopyrite [CuFe S2] Locality Picher Field Tri-State District Ottawa Co. Oklahoma, USA Size 19.0 x 14.5 x 6.0 cm 1892 g Consigned with Reserve by Stonetrust Dolomite Crystal System: Trigonal Physical Properties Photograph by Mike Haritos Transparency: Transparent, Translucent, Opaque Mohs hardness: 3.5 to 4 Density: 2.8 to 2.9 gm/cm3 Streak: White Luster: Vitreous Calcite [CaCO3] Locality Mexico Size 15.5 x 12.8 x 6.2 cm 1074 g Donated by Stonetrust Calcite Crystal System: Trigonal Physical Properties Transparency: Transparent, Translucent Mohs hardness: 3 Density: 2.71 gm/cm3 Streak: White Luster: Vitreous, Sub-Vitreous, Photograph by Mike Haritos Resinous, Waxy, Pearly Quartz [SiO2], var. Prase Locality Serifos Island Cyclade Islands Kykládes Prefecture Aegean Islands Dept. Greece Size 16.0 x 14.0 x 9.0 cm 1661 g Consigned with Reserve by Stonetrust Photograph by Mike Haritos The skarn mineralization on Serifos Island is noted for large crystals of quartz colored green by inclusions. Based on analyses the inclusions are typically actinolite or another amphibole mineral, but not the pyroxene mineral hedenburgite. See Hyrsl, J.; Niedermayr, G. (2003): Magic Worlds - Inclusions in Quartz. Bode Verlag GmbH, 240p Celestine [Sr(SO4)] (formally Celestite) Locality Sakoany deposit, Katsepy Commune Mitsinjo District, Boeny Region Mahajanga Prov., Madagascar Size 14.1 x 9.8 x 11.7 cm 2033 g Donated by Stonetrust Crystal System: Orthorhombic Physical Properties Transparency: Transparent to Sub-Translucent Photograph by Mike Haritos Mohs hardness: 3 to 3.5 Density: 3.9 to 4 gm/cm3 Streak: White Luster: Vitreous Calcite [CaCO3] & Sphalerite [(Zn,Fe)S] Locality Elmwood mine Carthage Central Tennessee Ba-F-Pb- Zn District Smith Co., Tennessee Size 9.7 x 7.1 x 5.5 cm 366 g Donated by Stonetrust Sphalerite Crystal System: Isometric Physical Properties Transparency: Transparent, Translucent Photograph by Mike Haritos Mohs hardness: 3.5 to 4 Density: 3.9 to 4.1 gm/cm3 Streak: Pale yellow to brown Luster: Adamantine, Resinous Descloizite [PbZn(VO4)(OH)] Locality Berg Aukas Mine Grootfontein District Otjozondjupa Region Namibia Size 12.4 x 8.5 x 3.1 cm 332 g Consigned by Stonetrust Crystal System: Orthorhombic Physical Properties Photograph by Mike Haritos Transparency: Transparent to Opaque Mohs hardness: 3.5 Density: 6.1 to 6.2 gm/cm3 Streak: Light brownish green Luster: Greasy Pyromorphite [Pb5(PO4)3Cl] on Baryte (Barite) [Ba(SO4)] Locality Les Farges Mine Ussel, Corrèze Limousin, France Size 9.4 x 7.4 x 5.7 cm 647 g Donated by Stonetrust Pyromorphite Crystal System: Hexagonal Physical Properties Transparency: Subtransparent to Photograph by Mike Haritos Subtranslucent Mohs hardness: 3.5 to 4 Density: 6.7 to 7.0 gm/cm3 Streak: White Luster: Adamantine - Resinous 3+ 5+ Stibiconite [Sb Sb 2O6(OH)] Locality San Luis Potosi Mexico Size 12.0 x 2.6 x 2.5 cm 295 g Donated by Stonetrust Crystal System: Isometric Physical Properties Photograph by Mike Haritos Transparency: Transparent to Translucent Mohs hardness: 4 to 5 Density: 4.1 to 5.8 gm/cm3 Stibiconite forms as an alteration product Streak: Light yellow of stibnite and other antimony minerals Luster: Vitreous - Dull 2+ Neptunite [KNa2Li(Fe ,Mn)2Ti2Si8O24] Locality California State Gem Mine (Dallas Gem Mine; Benitoite Mine; Benitoite Gem Mine; Gem Mine) Dallas Gem Mine area San Benito River headwaters area New Idria District Diablo Range San Benito Co., California Photograph by Mike Haritos Size Crystal System: Monoclinc Physical Properties 10.6 x 7.5 x 4.6 cm Transparency: Translucent 252 g Mohs hardness: 5 to 6 Density: 3.23 gm/cm3 Donated by Stonetrust Streak: Brown Luster: Vitreous 2+ Chromian Clinochlore [(Mg,Fe )5Al(Si3Al)O10(OH)8] (var. Kammererite) Locality Pembe Güle Mine Kop Daglari, Erzurum Prov. Eastern Anatolia Region Turkey Size 10.9 x 9.4 x 2.1 cm 434 g Consigned by Stonetrust Crystal System: Monoclinic Physical Properties Transparency: Transparent to Translucent Mohs hardness: 2 to 2.5 Photograph by Mike Haritos Density: 2.55 to 2.75 gm/cm3 Streak: White Luster: Vitreous - Pearly 2+ Baryte [BaSO4] & Chalcopyrite [CuFe S2] Locality Dreislar mine Dreislar village Sauerland, Germany Size 10.8 x 7.9 x 3.7 cm 567 g Donated by Stonetrust Barite Crystal System: Orthorhombic Physical Properties Transparency: Transparent to Photograph by Mike Haritos Translucent to Opaque Mohs hardness: 3 to 3.5 Density: 4.48 gm/cm3 Streak: White Luster: Vitreous 3+ Andradite [Ca3Fe 2(SiO4)3] var. Melanite Locality New Idria District San Benito County Diablo Range CA Size 7.9 x 5.2 x 2.3 cm 86 g Donated by Stonetrust Andradite Crystal System: Isometric Photograph by Mike Haritos Physical Properties Transparency: Transparent to Translucent Andradite is one of several mineral species Mohs hardness: 6.5 to 7 in the garnet group. The melanite variety of 3 Density: 3.7 to 4.1 gm/cm andradite derives its black color from the Streak: White presence of TiO2 impurities Luster: Vitreous Vanadinite [Pb5(VO4)3Cl] var. Endlichite Locality Erupción Mine (Ahumada Mine) Los Lamentos Mountains (Sierra de Los Lamentos) Mun. de Ahumada Chihuahua, Mexico Size 10.0 x 6.4 x 4.0 cm 406 g Donated by Stonetrust Crystal System: Hexagonal Photograph by Mike Haritos Physical Properties Transparency: Subtranslucent to opaque Mohs hardness: 3.5-4 Endlichite, Pb5([V, As]O4)3Cl, is the arsenic rich Density: 6.8 to 7.1 gm/cm3 variety of vanadinite with arsenic atoms (As) Streak: Brownish yellow substituting for some of the vanadium (V) Luster: Adamantine Molybdenite xls. [MoS2] & Quartz [SiO2] Locality Moly Hill mine La Motte Abitibi RCM, Abitibi- Témiscamingue Québec, Canada Size 6.6 x 5.0 x 3.2 cm 129 g Donated by Stonetrust Molybdenite Crystal System: Hexagonal Physical Properties Transparency: Opaque Mohs hardness: 1 Density: 5.5 gm/cm3 Streak: Greenish gray Photograph by Mike Haritos Luster: Metallic Stibnite [Sb2S3] Locality Jiangxi Province China Size 7.5 x 6.7 x 3.5 cm 103 g Donated by Stonetrust Stibnite Crystal System: Orthorhombic Physical Properties Transparency: Opaque Mohs hardness: 2 Density: 4.63 gm/cm3 Streak: Blackish gray Luster: Metallic Photograph by Mike Haritos Chrysocolla [(Cu,Al)2H2Si2O5(OH)4•n(H2O)] Locality Ojuela Mine Mapimí, Mun. de Mapimí Durango, Mexico Size 8.0 x 4.7 x 1.2 cm 33 g Donated by Stonetrust Chrysocolla Crystal System: Orthorhombic Physical Properties Photograph by Mike Haritos Transparency: Translucent to Opaque Mohs hardness: 2.5 to 3.5 Density: 1.9 to 2.4 gm/cm3 Streak: Light green Luster: Vitreous - Dull Vanadinite [Pb5(VO4)3Cl] & Galena [PbS] Locality Les Farges Mine Ussel Corrèze Limousin, France Size 5.3 x 5.2 x 4.5 cm 225 g Donated by Stonetrust Vanadinite Crystal System: Hexagonal Physical Properties Transparency: Subtranslucent to opaque Mohs hardness: 3.5-4 Density: 6.8 to 7.1 gm/cm3 Photograph by Mike Haritos Streak: Brownish yellow Luster: Adamantine 2+ Spessartine [Mn 3Al2(SiO4)3] Locallity Fujian Province China Size 7.1 x 5.8 x 2.4 cm 111 g Consigned by Stonetrust Spessartine Crystal System: Isometric Physical Properties Transparency: Transparent to Translucent Photograph by Mike Haritos Mohs hardness: 6.5 to 7.5 Density: 4.18 gm/cm3 Streak: White Spessartine is one of several mineral Luster: Vitreous - Resinous species in the garnet group. Wulfenite [Pb(MoO4)] Locality Mapimí Mun. de Mapimí Durango, Mexico Size 4.6 x 4.5 x 3.6 cm 63 g Donated by Stonetrust Wulfenite Crystal System: Tetragonal Physical Properties Transparency: Subtransparent to Subtranslucent Photograph by Mike Haritos Mohs hardness: 3 Density: 6.5 to 7 gm/cm3 Streak: Yellowish white Luster: Resinous - Greasy Quartz [SiO2], var. Amethyst Locality Mun. Las Vigas de Ramírez (Mun. de Profesor Rafael Ramírez) Veracruz, Mexico Size 3.6 x 3.5 x 1.5 cm 9 g Donated by Stonetrust Crystal System: Trigonal Physical Properties Transparency: Transparent, Translucent Photograph by Mike Haritos Mohs hardness: 7 Density: 2.65 to 2.66 gm/cm3 Streak: White Luster: Vitreous Calcite [CaCO3] Locality Tieshan Fe-Cu deposit (Daye iron mine) Tieshan District Huangshi Prefecture Hubei Province, China Size 7.0 x 6.8 x 3.7 cm 124 g Consigned by Stonetrust Crystal System: trigonal Physical
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  • Ferricerite-(La) (La, Ce, Ca)9Fe (Sio4)3(Sio3oh)4(OH)3

    Ferricerite-(La) (La, Ce, Ca)9Fe (Sio4)3(Sio3oh)4(OH)3

    3+ Ferricerite-(La) (La, Ce, Ca)9Fe (SiO4)3(SiO3OH)4(OH)3 Crystal Data: Hexagonal. Point Group: 3m. Forms boxwork-like aggregates of equant to tabular crystals flattened on [00*1] to 2 mm with dominant rhombohedral and pinacoidal faces, as pseudomorphs after an unidentified hexagonal prismatic mineral. Physical Properties: Cleavage: None. Tenacity: Brittle. Fracture: Conchoidal. Hardness = 5 D(meas.) = 4.7(1) D(calc.) = 4.74 Optical Properties: Translucent. Color: Light yellow to pinkish brown. Streak: White. Luster: Vitreous. Optical Class: Uniaxial (+). ω = 1.810(5) ε = 1.820(5) Cell Data: Space Group: R3c. a = 10.7493(6) c = 38.318(3) Z = 6 X-ray Powder Pattern: Mt. Yuksporr, Khibina massif, Kola Peninsula, Russia. 2.958 (100), 3.47 (40), 3.31(38), 2.833 (37), 2.689 (34), 1.949 (34), 3.53 (26) Chemistry: (1) (2) La2O3 37.57 CaO 5.09 Ce2O3 23.67 Fe2O3 1.40 Pr2O3 0.61 MgO 0.51 Nd2O3 1.48 SiO2 22.38 Sm2O3 0.10 P2O5 0.63 Gd2O3 0.24 H2O 3.20 SrO 1.97 Total 98.85 (1) Mt. Yuksporr, Khibina massif, Kola Peninsula, Russia; average electron microprobe analysis supplemented by IR spectroscopy, H2O by Penfield method; corresponds to (La4.23Ce2.65Ca1.37Sr0.35 Nd0.16Pr0.07Gd0.02Sm0.01)Σ=8.86(Fe0.32Ca0.30Mg0.23)Σ=0.85[SiO4]3[(Si0.84P0.16)Σ=1.00O3(OH)]4(OH)2.78. Mineral Group: Cerite supergroup, cerite group. Occurrence: A late-stage, low-temperature secondary phase in a symmetrically zoned, aegirine- natrolite-microcline vein in gneissose foyaite.
  • Tungsten Minerals and Deposits

    Tungsten Minerals and Deposits

    DEPARTMENT OF THE INTERIOR FRANKLIN K. LANE, Secretary UNITED STATES GEOLOGICAL SURVEY GEORGE OTIS SMITH, Director Bulletin 652 4"^ TUNGSTEN MINERALS AND DEPOSITS BY FRANK L. HESS WASHINGTON GOVERNMENT PRINTING OFFICE 1917 ADDITIONAL COPIES OF THIS PUBLICATION MAY BE PROCURED FROM THE SUPERINTENDENT OF DOCUMENTS GOVERNMENT PRINTING OFFICE WASHINGTON, D. C. AT 25 CENTS PER COPY CONTENTS. Page. Introduction.............................................................. , 7 Inquiries concerning tungsten......................................... 7 Survey publications on tungsten........................................ 7 Scope of this report.................................................... 9 Technical terms...................................................... 9 Tungsten................................................................. H Characteristics and properties........................................... n Uses................................................................. 15 Forms in which tungsten is found...................................... 18 Tungsten minerals........................................................ 19 Chemical and physical features......................................... 19 The wolframites...................................................... 21 Composition...................................................... 21 Ferberite......................................................... 22 Physical features.............................................. 22 Minerals of similar appearance.................................
  • Mottramite, Descloizite, and Vanadinite) in the Caldbeck Area of Cumberland

    Mottramite, Descloizite, and Vanadinite) in the Caldbeck Area of Cumberland

    289 New occurrences of vanadium minerals (mottramite, descloizite, and vanadinite) in the Caldbeck area of Cumberland. By ART~VR W. G. KINGSBURu F.G.S., Dept. of Geology and Mineralogy, University Museum, Oxford, and J. HARTLnY, B.Sc., F.G.S., Dept. of Geology, University of Leeds. [Taken as read 10 June 1954.] Summary.--Four new occurrences of vanadium minerals are described. New X-ray powder data are given for descloizite and mottramite, and show appreciable differences. Evidence is brought that the original occurrence of mottramite was not at Mottram St. Andrew, Cheshire, but Pim Hill, Shropshire, and that most if not all specimens labelled Mottram St. Andrew or Cheshire really came from Pim Hill. ANADIUM minerals are rare in the British Isles, and only two V species, mottramite (Cu, Zn)PbV0tOH and vanadinite Pbs(VO4)aC1, have so far been recorded from a limited number of localities. We do not include the vanadiferous nodules from Budleigh Salterton in Devon, as the vanadiferous mineral has not been identified. Mottramite, supposedly from Mottram St. Andrew in Cheshire, was first described in 1876,1 but we have evidence (below, p. 293) that the locality was in fact Pim Hill in Shropshire. ~ Vanadinite has so far only been found at Leadhills and Wanlockhead in Scotland. Vauquelinite has been de- scribed from Leadhills and Wanlockhead,a but the specimens have since been shown to be mottramite. 4 As a result of our investigations in the Lake District, we have found several new localities in the Caldbeck area for raottramite, deseloizite, and vanadinite. Higher part of Brandy Gill, Carroek Fell.