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 Properties  Transparency: transparent, translucent  Mohs hardness: 3  Density: approx 2.71 gm/cm3  Streak: white Photograph by Mike Haritos  Luster: Vitreous, Sub-Vitreous, Resinous, Waxy, Pearly Adamite [Zn2(AsO4)(OH)]

 Locality  Ojuela Mine  Mapimí  Mun. de Mapimí  Durango, Mexico  Size  9.5 x 5.1 x 1.0  85 g  Donated by Stonetrust

Crystal System: Orthorhombic Physical Properties  Transparency: Subtransparent  Mohs hardness: 3.5  Density: 4.3 to 4.5 gm/cm3  Streak: white Photograph by Mike Haritos  Luster: Vitreous - Resinous Fluorite [CaF2] & Sphalerite [(Zn,Fe)S]

 Locality  Elmwood mine  Carthage  Central Tennessee Ba-F-Pb-Zn District  Smith County  Tennessee  Size  9.0 x 5.8 x 5.2 cm  424 g  Donated by Stonetrust

Fluorite Crystal System: Isometric Physical Properties:  Transparency: Transparent to

Subtranslucent Photograph by Mike Haritos  Mohs hardness: 4  Density: 3.01 - 3.25 gm/cm3  Streak: white  Luster: Vitreous