A SAMPLER OF SELECTED 2017 BMC AUCTION SPECIMENS (2017 Auction Date is Saturday, 21 January)

Volume 2 [KCa4(Si4O10)2F•8(H2O)],

[NaCa4Al8Si28O72•30(H2O)] & [CaAl2Si3O10•3(H2O)]

 Locality  Pune District (Poonah District)  Maharashtra  India  Size  9.5 x 7.0 x 6.6 cm.  BMC Purchase

Scolecite System: Monoclinic Physical Properties  Transparency: Transparent - Subtranslucent Photograph by Mike Haritos  Mohs hardness: 5 to 5.5  Density: 2.16 to 2.4 gm/cm3  : White  Luster: Vitreous - Silky [CaF2] & [CaCO3]

 Locality  Cave-in-Rock Sub- District  Illinois - Kentucky Fluorspar District  Hardin Co., Illinois  Size  12.2 x 7.5 x 5.8 cm  BMC Purchase

Fluorite : Isometric Physical Properties  Transparency: Transparent  Mohs hardness: 4  Density: 3.18 - 3.56 gm/cm3  Streak: White Photograph by Mike Haritos  Luster: Vitreous, Dull [SiO2] on [FeS2]

 Locality  Trepča Stan Terg Mine  Trepča complex, Trepča valley  District of Kosovska  Mitrovica, Kosovo  Size  9.4 x 9.0 x 7.4 cm  Donated by Mike Haritos

MINERAL QUARTZ PYRITE Crystal System Trigonal Isometric Transparent, Transparency Opaque Translucent Hardness 7 6 to 6.5 2.65 to 2.66 Density 4.8 to 5 gm/cm3 gm/cm3 Greenish-black to Streak White Photograph by Mike Haritos Brownish-black Luster Vitreous Metallic Barite [BaSO4] on Fluorite [CaF2]

 Locality  Xiefang Mine  Ruijin County  Ganzhou Prefecture  Jiangxi Province  China  Size  14.9 x 11.9 x 8.1 cm  Donated by Bill Metropolis

Barite Crystal System: Orthorhombic Physical Properties  Transparency: Transparent, Translucent, Opaque  Mohs hardness: 3 to 3.5  Density: approx 4.5 gm/cm3 Photograph by Mike Haritos  Streak: White  Luster: Vitreous, Pearly Stilbite [NaCa4Al8Si28O72•30(H2O)] on Stalactitic (Quartz) [SiO2]

 Locality  Pune District (Poonah District)  Maharashtra  India  Size  7.0 x 6.1 x 4.1 cm  BMC Purchase

MINERAL Stilbite Chalcedony Crystal System Monoclinic Triclinic Transparent, Opaque, Transparency Subtransparent, Transparent, Translucent Translucent Hardness 3.5 to 4 6.5 to 7 Density 2.1 – 2.2 gm/cm3 2.6 – 2.65 gm/cm3 Streak White White Photograph by Mike Haritos Luster Vitreous - Pearly Vitreous Quartz [SiO2] var.

 Locality  Thunder Bay District  Ontario  Canada  Size  17.4 x 12.9 x 4.1 cm  Donated by Bill Metropolis

Crystal System: Trigonal Physical Properties  Transparency: Transparent, Translucent  Mohs hardness: 7  Density: 2.65 to 2.66 gm/cm3  Streak: White Photograph by Mike Haritos  Luster: Vitreous [PbS]

 Locality  Krushev dol deposit  Krushev dol mine  Madan ore field  Rhodope Mts  Smolyan Oblast  Bulgaria  Size: 5.6 x 4.5 x 3.5 cm  BMC Purchase

Galena Crystal System: Isometric Physical Properties  Transparency: Opaque  Mohs hardness: 2.5  Density: approx 7.58 gm/cm3  Streak: Lead - Grey Photograph by Mike Haritos  Luster: Metallic, Dull [CaMO4] & Stilbite [NaCa4Al8Si28O72•30(H2O)]

 Locality  Pune District (Poonah District)  Maharashtra  India  Size  5.5 x 4.5 x 3.0 cm  BMC Purchase MINERAL Powellite Stilbite Tetragonal- Crystal System Monoclininc Dipyramidal Transparent, Transparent, Transparency Subtransparent, Translucent Translucent Hardness 3.5 to 4 3.5 to 4 Photograph by Mike Haritos Density 4.34 gm/cm3 2.1 – 2.2 gm/cm3 Streak Light yellow White Powellite exhibits bright yellow Adamantine - fluorescence under SWUV light Luster Vitreous - Pearly Resinous [ZnS] & Galena [PbS]

 Locality  Krushev dol deposit (Krusov dol deposit)  Krushev dol mine  Madan ore field  Rhodope Mountains  Smolyan Oblast  Bulgaria

 Size

 8.5 x 5.2 x 2.3 cm Photograph by Mike Haritos

 BMC Purchase Sphalerite Crystal System: Isometric Sphalerite Physical Properties  Transparency: Transparent, Translucent  Mohs hardness: 3.5 to 4  Density: 3.9 - 4.1 gm/cm3  Streak: Pale Yellow to Brown  Luster: Adamantine, Resinous [Ca(VO)Si4O10·4H2O]

 Locality

 Pune District (Poonah District)

 Maharashtra

 India  Size

 4.1 x 3.5 x 3.2 cm  BMC Purchase

Pentagonite Crystal System: Orthorhombic Physical Properties  Transparency: Transparent  Mohs hardness: 4 to 5  Density: 2.33 gm/cm3  Streak: Light Blue Photograph by Mike Haritos  Luster: Vitreous, Resinous [Na2Ca2Al6Si9O30•8(H2O)] and

Stilbite [NaCa4Al8Si28O72•30(H2O)]

 Locality  Pune District (Poonah District)  Maharashtra  India  Size  7.0 x 3.2 x 3.2 cm  BMC Purchase

Mesolite Crystal System: Monoclinic Physical Properties  Transparency: Transparent - Translucent Photograph by Mike Haritos  Mohs hardness: 5  Density: 2.2 to 2.4 gm/cm3  Streak: White  Luster: Vitreous, Silky Fluorite [CaF2]

 Locality  Hunan  China  Size  15.3 x 10.5 x 8.4 cm.

Fluorite Crystal System: Isometric Physical Properties  Transparency: Transparent  Mohs hardness: 4  Density: 3.18 - 3.56 gm/cm3

 Streak: White Photograph by Mike Haritos  Luster: Vitreous, Dull Calcite [CaCO3]

 Locality  China  Size  6.7 x 5.5 x 4.0 cm  BMC Purchase

Calcite Crystal System: Trigonal Physical Properties  Transparency: Transparent, Translucent  Mohs hardness: 3  Density: 2.71 gm/cm3  Streak: White  Luster: Vitreous, Sub-Vitreous, Resinous, Photograph by Mike Haritos Waxy, Pearly Ammonite Fossil

 Locality

 Alberta

 Canada.  Size

 7.5 x 6.2 x 2.3 cm  BMC Purchase

Photograph by Mike Haritos Calcite [CaCO3]

 Locality  Chang-Lin Mine  China  Size  6.3 x 4.5 x 4.5 cm  BMC Purchase

Calcite Crystal System: Trigonal Physical Properties  Transparency: Transparent, Translucent  Mohs hardness: 3  Density: 2.71 gm/cm3  Streak: White  Luster: Vitreous, Sub-Vitreous, Resinous,

Waxy, Pearly Photograph by Mike Haritos [CuSiO2(OH)2]

 Locality

 Guchab

 Namibia  Size

 6.0 x 5.5 x 5.3 cm  BMC Purchase

Crystal System: Trigonal Physical Properties  Transparency: Transparent to Translucent  Mohs hardness: 5  Density: 3.28 to 3.35 gm/cm3  Streak: Green  Luster: Vitreous Photograph by Mike Haritos [Zn(CO3)]

 Locality  Choix  Sinola  Mexico  Size  4.5 x 4.3 x 4.0 cm  120 g  Donated by Don Olson

Crystal System: Trigonal Physical Properties  Transparency: Subtransparent to Translucent  Mohs hardness: 4.5  Density: 4.4 to 4.5 gm/cm3  Streak: White Photograph by Mike Haritos  Luster: Vitreous 2+ Calcite [CaCO3] & [CuFe S2]

 Locality  Sweetwater Mine  Reynolds County  Missouri  Size  4.9 x 4.9 x 3.4 cm  57 g  Donated by Don Olson MINERAL CALCITE CHALCOPYRITE Crystal System Tetragonal Tetragonal Transparent, Transparency Opaque Translucent Hardness 3 3.5 4.1 to 4.3 Density 2.71 gm/cm3 gm/cm3 Photograph by Mike Haritos Streak White Greenish black Vitreous, Resinous, Luster Metallic Waxy, Pearly 2+ [Mn (CO3)] & Pyrite [FeS2]

 Locality  Wutong Mine  Wuzhou Prefecture  Guangxi Zhuang Autonomous Republic  China  Size  5.0 x 3.8 x 2.5 cm  47 g  Donated by Collector’s Edge

Rhodochrosite Crystal System: Trigonal Physical Properties  Transparency: Translucent to Photograph by Mike Haritos Subtranslucent  Mohs hardness: 3  Density: 3.69 gm/cm3  Streak: White  Luster: Vitreous 2+ 3+ * [(Na,Ca)(Mg,Li,Al,Fe ,Fe )3(Al,Mg)6(BO3)3Si6O18(OH,O,F)4]

 Locality  Minas Gerais  Brazil  Size  7.2 x 4.0 x 3.1 cm  129 g  Donated by Collector’s Edge

Crystal System: Trigonal Formula: * The formula is general and includes all options within the tourmaline group Physical Properties  Transparency: Transparent to Opaque  Mohs hardness: 7 to 7.5  Density: 2.9 to 3.2 gm/cm3  Streak: White  Luster: Vitreous Photograph by Mike Haritos Tourmaline 2+ 3+ * [(Na,Ca)(Mg,Li,Al,Fe ,Fe )3(Al,Mg)6(BO3)3Si6O18(OH,O,F)4]

 Locality  Skardu  Pakistan  Size  4.3 x 1.8 x 1.7 cm  11 g  Donated by Barbara Liebman

Crystal System: Trigonal Formula: * The formula is general and includes all options within the tourmaline group Physical Properties  Transparency: Transparent to Opaque  Mohs hardness: 7 to 7.5  Density: 2.9 to 3.2 gm/cm3  Streak: White  Luster: Vitreous Photograph by Mike Haritos Pyrite [FeS2]

 Locality  Navajun  La Roija  Spain  Size  6.5 x 6.5 x 5.4 cm  304 g  BMC Purchase

Pyrite Crystal System: Isometric Physical Properties  Transparency: Opaque  Mohs hardness: 6 to 6.5  Density: 4.8 to 5 gm/cm3  Streak: Greenish-black to Brownish-black Photograph by Mike Haritos  Luster: Metallic Galena [PbS]

 Locality  Krushev dol deposit  Krushev dol mine  Madan ore field  Rhodope Mountains  Smolyan Oblast  Bulgaria

 Size: 6.5 x 6.0 x 2.5 cm.

 BMC Purchase

Crystal System: Isometric Physical Properties  Transparency: Opaque  Mohs hardness: 2.5  Density: approx 7.58 gm/cm3  Streak: Lead - Grey Photograph by Mike Haritos  Luster: Metallic, Dull