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McDougall Minerals sells high-quality mineral specimens from all over the world to collectors of all levels, from beginners to connoisseurs

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John Betts - Fine Minerals, New York. Dealers of Fine Minerals and Natural Crystal Clusters since 1989. We buy rock collections, we buy gem collections, we buy mineral collections.

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's Image Gallery With 4041 Images

Grossular Image

Images:

Grossular: Ca3Al2(SiO4)3
Diopside: CaMgSi2O6

Comments: Pale blue prismatic crystal of diopside with orange-brown grossular.
Location: Val d'Aosta, Italy. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Grossular Image

Images:

Grossular: Ca3Al2(SiO4)3

Comments: Gemmy, transparent, cinnamon-colored grossular crystals averaging 7 mm in size.
Location: Jeffrey mine, Asbestos, Quebec, Canada. Scale: 3.5 x 4 x 1.5 cm.
© Dan Weinrich

Grossular Image

Images:

Grossular: Ca3Al2(SiO4)3
Vesuvianite: Ca10Mg2Al4(SiO4)5(Si2O7)2(OH)4

Comments: Blocky, tan-colored vesuvianite with white grossular (garnet).
Location: Sierra de la Cruz, Lago Jaco, Coahuila, Mexico. Scale: 3.5 x 4.5 cm.
© Fabre Minerals

Groutite Image

Images:

Groutite: Mn+++O(OH)

Comments: Prismatic crystals of groutite in white marble.
Location: Talcville, Saint Lawrence County, New York, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Grumiplucite Image

Images:

Grumiplucite: HgBi2S4

Comments: Gray crystals of grumiplucite on quartz.
Location: Levigliani, Apuan Alps, Lucca Province, Tuscany, Italy. Scale: Picture size 1.2 mm.
© Thomas Witzke / Abraxas-Verlag

Grunerite Image

Images:

Grunerite: [ ]Fe++7Si8O22(OH)2

Comments: Olive green fibrous crystal aggregates of grunerite in rock matrix.
Location: Michigamme, Iron County, Michigan, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Gruzdevite Image

Images:

Gruzdevite: Cu6Hg3Sb4S12

Comments: Black aggregates of gruzdevite in matrix.
Location: Moctezuma mine, Sonora, Mexico. Scale: Picture Size 1 cm.
© Rhonda Spencer / ASDM Sonoran Desert Digital Library

Guanacoite Image

Images:

Guanacoite: (Cu,Mg)2Mg2(Mg,Cu)(OH)4(H2O)4(AsO4)2

Comments: Deep blue, bladed, glassy crystals of guanacoite to 0.75mm lining vugs of arhbarite..
Location: El Guanaco Mine, Guanaco, Taltal, Antofagasta Province, Chile. Scale: Picture Size 5mm.
© Tom Loomis / Dakota Matrix

Guanajuatite Image

Images:

Guanajuatite: Bi2Se3

Comments: Prismatic crystalline guanajuatite, altering to a blue crust, in white calcite.
Location: Falun, Kopparberg, Sweden. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Guarinoite Image

Images:

Guarinoite: (Zn,Co,Ni)6(SO4)(OH,Cl)10·5(H2O)

Comments: Pale pink microcrystalline crust of guarinoite on matrix.
Location: Cap Garonne mine, Var, France. Scale: Thumbnail.
© Tom Loomis / Dakota Matrix

Gudmundite Image

Images:

Gudmundite: FeSbS

Comments: Steel gray metallic crystalline gudmundite, tarnishing, massive in rock.
Location: Pezinock, Zapadoslovensky, Slovakia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Guerinite Image

Images:

Guerinite: Ca5(AsO3OH)2(AsO4)2·9(H2O)

Comments: White blebs of guerinite on erythrite.
Location: Wechsel Schacht, Richelsdorf, Hesse, Germany. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Guildite Image

Images:

Guildite: CuFe+++(SO4)2(OH)·4(H2O)
Magnesiocopiapite: MgFe+++4(SO4)6(OH)2·20(H2O)

Comments: Brown granular guildite with greenish yellow magnesiocopiapite.
Location: United Verde Mine, Jerome, Yavapai County, Arizona, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Guilleminite Image

Images:

Guilleminite: Ba(UO2)3(SeO3)2O2·3(H2O)

Comments: Radial, yellow aggregates of acicular crystals of guilleminite on green malachite.
Location: Musonoi mine, Kolwezi, Shaba, Democratic Republic of the Congo. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Guimaraesite Image

Images:

Guimaraesite: Ca2(Zn,Mg,Fe)5Be4(PO4)6(OH)4·6H2O

Comments: Brown guimaraesite spheres and crystal aggregates..
Location: Piaui district, Itinga, Minas Gerais, Brazil. Scale: Specimen size 2 mm.
© Diederik Visser

Guimaraesite Image

Images:

Guimaraesite: Ca2(Zn,Mg,Fe)5Be4(PO4)6(OH)4·6H2O

Comments: Botryoidal guimaraesite on eosphorite.
Location: Piaul District, Itinga, Minas Gerais, Brazil. Scale: Specimen size 1.1 x 0.9 x 0.8 cm.
© Rob Lavinsky

Gunningite Image

Images:

Gunningite: (Zn,Mn)SO4·(H2O)

Comments: White crust of gunningite on massive sulfide ore.
Location: Brunswick 12 Open Pit, Bathurst, New Brunswick, Canada. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Gupeiite Image

Images:

Gupeiite: Fe3Si

Comments: BSE image of a gupeiite (1) nodule surrounded by TiO2 (2).
Location: Turishkino, Leningrad District, Russia. Scale: See Image.
© Diederik Visser

Gustavite Image

Images:

Gustavite: PbAgBi3S6 (?)

Comments: Gray metallic gustavite in matrix.
Location: South Mountain, Owyhee County, Idaho, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Gutkovaite-Mn Image

Images:

Gutkovaite-Mn: CaK2Mn(Ti,Nb)4(Si4O12)2(O,OH)4·5(H2O)

Comments: Pale pink gutkovaite-(Mn) in matrix.
Location: Malyi Mannepakhk Mt., Chibiny, Kola, Russia. Scale: Specimen Size 1.5x2 cm.
© Diederik Visser

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