2 mm aggregate of brownish-yellow grainy kuznetsovite, the only known mercury chloroarsenate. The mineral is photo-sensitive and thus generally stored in a special box. A white thing near upper-left corner is a pointer. Both kuznetsovite and associated yellow-orange unkown minerals are about to be analyzed. This is Mikhail Murasho specimen, delivered by Sergey Vasiliev - thanks!
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