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Minerals

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An electron micrograph of volcanic sublimates (minerals) in natural colors. Two different forms of copper molybdate Cu3O(MoO4)2 (cupromolybdite) – a mineral from fumarolic incrustations, Tolbachik, Kamchatka. Both forms of the mineral - bright yellow needles and massive brown crystals (right) - have the same composition and structure. The image also contains copper sulfate fedotovite K2Cu3O(SO4)3 (fine green crystals), langbeinite K2Mg2(SO4)3 (light gray crystals on top of the image), and palmierite (K, Na)2Pb(SO4)2 (light pseudohexagonal tabular crystals). Image size is 350 microns along the long side. Mineral

Cupromolybdite

cupromolybdite

Formula
Cu²⁺3O(Mo⁶⁺O4)2
Mineral

Cuproneyite

cuproneyite

Formula
Cu7Pb27Bi25S68
Mineral

Cupropavonite

cupropavonite

Formula
Cu0.9Ag0.5Pb0.6Bi2.5S5
Mineral

Cupropearceite

cupropearceite

Formula
[Cu6As2S7][Ag9CuS4]
Analyzed polished section of Fe,Bi-rich cupropolybasite from the famous Norilsk deposit in Russia. Ex Vandenbroucke Museum collection from Waregem, Belgium Mineral

Cupropolybasite

cupropolybasite

Formula
[Cu6Sb2S7][Ag9CuS4]
Silvery metallic nugget of the extremely rare Rh and Ir minerals, cuprorhodsite and cuproiridsite, in an analyzed specimen by SEM/EDS by the former owner of the specimen (the Vandenbroucke Museum). fROM: Aldan Shield, Sakha Republic, Russian Federation. Mineral

Cuprorhodsite

cuprorhodsite

Formula
(Cu1+0.5Fe³⁺0.5)Rh³⁺2S4
Mohs
5
Grass green crystal aggregates of the rare mineral cuprorivaite from Cornwall (Wheal Edward, St Just, Cornwall, United Kingdom). It seems that cuprorivaite from this locality is grass green, not blue. Ex Vandenbroucke Museum collection from Waregem, Belgium. Mineral

Cuprorivaite

cuprorivaite

Formula
CaCuSi4O10
Cristal de muy buen tamaño de esta sulfosal boliviana, de fórmula AgPbSb₃S₆. Hace pocos años se conocía como "andorita VI". El ejemplar nos muestra caras con crecimiento paralelos, estriaciones y un brillo entre gris y dorado. Las caras terminales pueden observarse. La pieza ha sido analizada mediante SEM-EDS y nos muestra la presencia de cobre, por lo que podemos identificar la cuprosenandorita al ejemplar: Ag₁₆Cu₈Pb₂₄Sb₇₂S₁₄₄. Estos ejemplares de la mina San José suelen mostrar intercrecimiento de la senandorita, ortorrómbica, con la quatrandorita, con la misma composición química pero monoclínica. Un cristal excepcional, de la localidad tipo para la especie! Medidas: 3.6 x 2.1 x 1.4 cm. Localidad Tipo Mineral

Cuprosenandorite

cuprosenandorite

Formula
Ag16Cu8Pb24Sb72S144
Cuprosklodowskite - Musonoi Mine, Kolwezi, Katanga (Shaba), Zaïre (XX1.2cm) Mineral

Cuprosklodowskite

cuprosklodowskite

Formula
Cu(UO2)2(SiO3OH)2·6H2O
Mohs
4
Mineral

Cuprospinel

cuprospinel

Formula
Cu²⁺Fe³⁺2O4
Purple metallic aggregates of the very rare thallium mineral cuprostibite from the type locality in Greenland (Nakkaalaaq, Ilímaussaq, Narsaq, Kujalleq, Greenland). Ex.Dr.Hartel collection. Mineral

Cuprostibite

cuprostibite

Formula
Cu2(Sb,Tl)
Cuprotungstite Locality: Gamsberg, Khomas Region, Namibia (Locality at mindat.org) Size: 5.2 x 3.4 x 3 cm. A very fine specimen of the rare (for this location) Cuprotungstite. These clusters are composed of olive green tabular microcrystals. This is the first time I have seen this species even mentioned from Gamsberg. Often, Cuprotungstite is found after Scheelite, but since there is no Scheelite, I wonder if these exceptional pockets are primary. Either way, a strange locality for Cuprotungstite. Ex. Charlie Key stock. Mineral

Cuprotungstite

cuprotungstite

Formula
Cu2(WO4)(OH)2
Mineral

Cuprozheshengite

cuprozheshengite

Formula
Pb4CuZn2(AsO4)2(PO4)2(OH)2
Curetonite Locality: Redhouse Barite Mine, Potosi District, Humboldt County, Nevada, USA (Locality at mindat.org) Size: small cabinet, 5.6 x 3.7 x 2.9 cm Curetonite This specimen, sold by rarities dealer John Metteer to John White, hosts two very minute but eye-visible smears of green on one face…and that is actually a pretty good representative example of this very rare species named after dealer and collector Forrest Cureton. This is the TYPE and ONLY locale for the species, which is a complex titanium-bearing phosphate. Ex. John White Collection. Mineral

Curetonite

curetonite

Formula
Ba(Al,Ti)(PO4)(OH,O)F
Curienite, Francevillite Locality: Mounana Mine (Mouana Mine), Franceville, Haut-Ogooué Province, Gabon (Locality at mindat.org) Size: small cabinet, 7.7 x 6.4 x 3.7 cm Francevillite with Curienite A solid, rich specimen that is almost entirely covered on the display face, with beautiful orange Francevillite accented by yellow curienite. Rich, pretty, and fiery in color - this is a rather showy large piece! TYPE LOCALITY for both species Mineral

Curienite

curienite

Formula
Pb(UO2)2(VO4)2·5H2O
Mohs
3
Curite - Locality: Katanga, Africa - Exposed in the Mineralogical Museum, Bonn, Germany Mineral

Curite

curite

Formula
Pb3(UO2)8O8(OH)6 * 3H2O
Outstanding white acicular crystals of the mineral currierite (IMA 2016-030) from the type and only known locality worldwide: Torrecillas Mine, Salar Grande, Iquique, Tarapacá Region, Chile. Associated mineral is minoritary pink magnesiokoritnigite. Currierite was named in honour of the late Rock Currier well known mineral dealer, Mindat manager, collector, author and lecturer. Mineral

Currierite

currierite

Formula
Na4Ca3MgAl4(AsO3OH)12·9H2O
Outstanding yellowish cuspidine crystals from the type locality in Vesuvius: Monte Somma, Vesuvius, Campania, Italy. Mineral

Cuspidine

cuspidine

Formula
Ca8(Si2O7)2F4
Mineral

Cuyaite

cuyaite
Outstanding brown microcrystals of Cuzticite, a very rare tellurium mineral from the type locality (Moctezuma Mine, Moctezuma, Moctezuma Municipality, Sonora, Mexico). Ex Vandenbroucke Museum collection from Waregem, Belgium. Mineral

Cuzticite

cuzticite

Formula
Fe³⁺2Te⁶⁺O6·3H2O
Mineral

Cyanochroite

cyanochroite

Formula
K2Cu(SO4)2 * 6H2O
Cyanotrichite, Malachite Locality: Maid of Sunshine Mine, Turquoise District (Courtland-Gleeson District), Dragoon Mts, Cochise County, Arizona, USA (Locality at mindat.org) Size: 6.2 x 5.2 x 4.4 cm. Cyanotrichite is an uncommon copper sulfate found in the oxidation zone of copper ore bodies. This rich and very colorful layered specimen has tiny, acicular, radiating, powder-blue to royal-blue cyanotrichite needles with contrasting green malachite in gossan matrix. This fine, old piece from the Maid of Sunshine Mine of Arizona. Mineral

Cyanotrichite

cyanotrichite

Formula
Cu4Al2SO4(OH)12·2H2O
Mohs
2
Cylindrite Locality: Poopó town, Poopó Province, Oruro Department, Bolivia (Locality at mindat.org) A very rich specimen of lustrous, metallic, cylindrical crystals to 3.0 cm of the rare sulfosalt cylindrite from Poopo, Bolivia. These are very long crystals for the species and yes, they ARE truly weird cylndrical crystals!!!. Ex Richard Hauck Collection. HARD TO GET PIECES WITH SUCH NICE DEFINITION! 5.5 x 3.3 x 2.6 cm Mineral

Cylindrite

cylindrite

Formula
FePb3Sn4Sb2S14
Mohs
2.5
Cymrite Dimensions: 2.2 x 1.6 x 1.6 cm Locality: Benallt Mine (Tyddyn Meirion mine; Ty Canol mine), Rhiw, Llanfaelrhys, Lleyn Peninsula, Gwynedd, Wales, UK Description: A significant and rare micro of this barium aluminum silicate, from the type locality for the species. This specimen is from the American Museum. It was given to them by the British Museum and the AMNH label states on the reverse side: "Part of BM 1944,48" which we take to indicate that this was part of the BM-studied type material (in residence at that time at the BMNH before publication in 1949). From the #1 Orebody. Mineral

Cymrite

cymrite

Formula
BaAl2Si2(O,OH)8 * H2O