2.5x2x2 cm fragmrnt of pebble of REE minerals nodule from gold placier. Central orange-brown part with resinous lustre is massive bastnaesite-(La) monograin. Black outer rim is composed of brownish-black granular dissakisite-(La) with small relicts of britholite-(Ce). Formula of this dissakisite-(La) is (Ca1.11(La.49Ce.36).85Mn.04)2.00((Mg.45Fe".32Mn.12).90Fe"'.51Al1.54Ti.05)3.00Si3.00O12(OH). Mochalin Log, Kyshtym, Chelyabinsk Oblast', Urals Region, Russia. Collection, analysis and photo of Pavel M. Kartashov.
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