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Ferchromide : Cr1.5Fe0.5-x | |
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Verkhneivinsk, Neiva river, Sysert' District, Ekaterinburgskaya (Sverdlovskaya) Oblast', Middle Urals, Urals Region, Russia 0.1 cm crystal grouping. S268-32 Excalibur Mineral specimen. |
| © 2008, JGW | Photo ID: 149696 View Count: 259 |
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Neiva River, Sysert' district, Ekaterinburgskaya (Sverdlovskaya) Oblast', Middle Urals, Urals Region, Russia 0.9 mm micronugget of osmiridium ("nev'yanskite") with composition (Ir.70Os.26Ru.02Pt.02) from heavy nonmagnetic concentrate of sands Neiva river. Note bright metallic tin-white appearance of the mineral. Associating minerals in the concentrate are iridosmine ("sysertskite"), gold, electrum, "chromite" and native tin. Pavel M. Kartashov collection ... |
| © Pavel M. Kartashov | Photo ID: 158750 View Count: 238 |
Iridium (Var: Osmiridium) : (Ir,Os,Ru) | |
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Neiva River, Sysert' district, Ekaterinburgskaya (Sverdlovskaya) Oblast', Middle Urals, Urals Region, Russia Back side of the same 0.9 mm micronugget of osmiridium ("nev'yanskite") with composition (Ir.70Os.26Ru.02Pt.02) from heavy nonmagnetic concentrate of sands Neiva river. Note bright metallic tin-white appearance of the mineral and morphology of its grain typical for iridium - nonhexagonal member of Os-Ir-Ru system. Associating minerals in the ... |
| © Pavel M. Kartashov | Photo ID: 158758 View Count: 174 |
Isovite : (Cr,Fe)23C6 | |
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Verkhneivinsk, Neiva river, Sysert' District, Ekaterinburgskaya (Sverdlovskaya) Oblast', Middle Urals, Urals Region, Russia Dark gray metallic grain of isovite. Grain size 0.7 mm. Photographer and collection Thomas Witzke. |
| © Thomas Witzke | Photo ID: 8124 View Count: 742 |
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Neiva River, Sysert' district, Ekaterinburgskaya (Sverdlovskaya) Oblast', Middle Urals, Urals Region, Russia 0.8x0.6x0.3 mm hexagonal dipyramidal-pinakoidal crystal of osmium with very widespread composition (Os.51Ir.42Ru.07) - according to L. Cabri classification it had belong to iridosmine compositional field, but according to 50% rule, accepted by IMA, it is osmium now. The crystal is composed by hexagonal dipyramide and pinacoids. Note skeletoidal ... |
| © Pavel M. Kartashov | Photo ID: 167478 View Count: 470 |
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Neiva River, Sysert' district, Ekaterinburgskaya (Sverdlovskaya) Oblast', Middle Urals, Urals Region, Russia Brownish films of romarchite covering surface of micronugget of native tin from heavy nonmagnetic concentrate of sands Neiva river. Very small grains of gold are included into romarchite crust (upper and lower parts of the left side this specimen). FOV is ~3x2 mm. Pavel M. Kartashov collection and photo. |
| © Pavel M. Kartashov | Photo ID: 158768 View Count: 190 |
Ruthenium : (Ru,Ir) | |
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Neiva River, Sysert' district, Ekaterinburgskaya (Sverdlovskaya) Oblast', Middle Urals, Urals Region, Russia Small 0.4x0.3 mm rounded grain of native ruthenium with composition Ru.60Os.26Ir.14 picked out from PGM concentrate of Neiva river sands. According to L. Cabri classification it was belong to rutheniridosmine field, but according to 50% rule, accepted by IMA, it is ruthenium now, in spite of the fact that, pure Ru content in this alloy is only ... |
| © Pavel M. Kartashov | Photo ID: 162711 View Count: 196 |
Ruthenium : (Ru,Ir) | |
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Verkhneivinsk, Neiva river, Sysert' District, Ekaterinburgskaya (Sverdlovskaya) Oblast', Middle Urals, Urals Region, Russia 0.05 cm crystal aggregate, identification confirmed by electron dispersive spectroscopy. S398-01 Excalibur Mineral Company specimen. |
| © 2008, JGW | Photo ID: 187777 View Count: 117 |
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Neiva River, Sysert' district, Ekaterinburgskaya (Sverdlovskaya) Oblast', Middle Urals, Urals Region, Russia Broken side of micronugget of native Tin from heavy nonmagnetic concentrate of sands Neiva river. Fresh broken surface demonstrate to us the typical tin-white colour of metal. Associated minerals invisible on the photo are small grains of Gold included into Romarchite crust covering native metal. FOV is ~2.3x1.7 mm. Pavel M. Kartashov collection ... |
| © Pavel M. Kartashov | Photo ID: 159158 View Count: 172 |
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