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Chalcedony | |
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Staraya Sitnya, Moscow Oblast' (Moscovskaya Oblast'), Central Region, Russia Large 150x100x55 mm wandering chalcedony specimen, that am collected during a little trip to the old agathic locality - "Staraya Sitnya", that is located approximately in 120 kilometers to the south from Moscow, June 2009. |
| © Lopatkin Oleg | Photo ID: 236804 View Count: 59 |
Chalcedony (Var: Agate) : SiO2 | |
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Staraya Sitnya, Moscow Oblast' (Moscovskaya Oblast'), Central Region, Russia Large 220x130x180 mm rough agate, that am collected during a little trip to the old agathic locality - "Staraya Sitnya", that is located approximately in 120 kilometers to the south from Moscow, June 2009. |
| © Lopatkin Oleg | Photo ID: 236803 View Count: 78 |
Glauconite : K0.08R11.33 R20.67 [][Al0.13Si3.87O10](OH)2 | |
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Moscow Oblast' (Moscovskaya Oblast'), Central Region, Russia Compact Glauconite concretion from sands of Cretaceous age. This concretion is unexpectedly massive and heavy - its weight is 34 g, size 4x3 cm. Collected on unspecified sand quarry near Alexandrov in October of 2009. Pavel M. Kartashov collection and photo. |
| © Pavel M. Kartashov | Photo ID: 258435 View Count: 21 |
Glauconite : K0.08R11.33 R20.67 [][Al0.13Si3.87O10](OH)2 | |
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Moscow Oblast' (Moscovskaya Oblast'), Central Region, Russia 4x2.5 cm compact Glauconite concretion from sands of Cretaceous age. Collected on unspecified sand quarry near Alexandrov in October of 2009. Pavel M. Kartashov collection and photo. |
| © Pavel M. Kartashov | Photo ID: 258433 View Count: 19 |
Calcite (Var: Nickeloan Calcite) : (Ca,Ni)[CO3], Calcite : CaCO3 | |
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Podol'sk, Moscow Oblast' (Moscovskaya Oblast'), Central Region, Russia Crust of calcite from karst in dolomitized limestones of Carbon age. More former layer of pure Calcite is greyish, while the more later layer of Nickeloan Calcite with ~2 mas.% NiO has greenish colour. FOV is ~5.5x3.5 cm. Collected by Victor I. Stepanov 14 August 1960 in quarry #2 near Podol'sk. Pavel M. Kartashov collection and photo. |
| © Pavel M. Kartashov | Photo ID: 258424 View Count: 70 |
Calcite (Var: Nickeloan Calcite) : (Ca,Ni)[CO3], Calcite : CaCO3 | |
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Podol'sk, Moscow Oblast' (Moscovskaya Oblast'), Central Region, Russia Calcite crust from karst in dolomitized limestones of Carbon age. Limestone is coloured by karst clay material - "terra rossa". More former layer of pure Calcite is greyish to colourless, while the more later layer of Nickeloan Calcite with ~2 mas.% NiO has greenish colour. Specimen size is 9x6x2.5 cm. Collected by Victor I. Stepanov 14 August ... |
| © Pavel M. Kartashov | Photo ID: 258430 View Count: 36 |
Struvite : NH4MgPO4·6H2O, Apatite-(CaCl) : Ca5[Cl|(PO4)3] | |
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Moscow Oblast' (Moscovskaya Oblast'), Central Region, Russia SEM image of struvite crystals covered by chlorapatite minute spherulites. Nephrolith (kidney stone). XRD and microprobe diagnostics. Andrey V. Mokhov photo. |
| © Pavel M. Kartashov | Photo ID: 70499 View Count: 248 |
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Podol'sk, Moscow Oblast' (Moscovskaya Oblast'), Central Region, Russia Green masses of Takovite on matrix of dolomitized limestone of Carbon age. Associating minerals are white masses of Allophane and velvet-black globular to dendritic Asbolane. Specimen size is 7.5x5x2.5 cm. Collected by Victor I. Stepanov 14 August 1960 in quarry #2 near Podol'sk. Pavel M. Kartashov collection and photo. |
| © Pavel M. Kartashov | Photo ID: 258469 View Count: 20 |
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