| Mineral: | Polyakovite-(Ce): (Ce,La,Nd,Pr,Ca)4(Mg,Fe++)(Cr,Fe+++)2(Ti,Nb)2Si4O22
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| Comments: | Black, pitchy, polyakovite-(Ce) crystal showing conchoidal surfaces so typical for this mineral. Green fluororichterite overgrowth is just visible. Measured radioactivity is 146µR/h. |
| Location: | Pit No. 97 (N97 Mine), Ilmen Natural Reserve, Ilmen Mts, Chelyabinsk Oblast', Southern Urals, Urals Region, Russia. |
| Scale: | Specimen size is 4.5x3x2.5 cm. |
| Copyright: | © Pavel M. Kartashov |
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.jpg "Large Polyakovite-(Ce) Image")