I will be at the TNMS in Tucson, February 5 to 11, 2019! See you at the show!


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From the "type" locality: Uzon Caldera, Kamchatka Oblast, Far-Eastern Region, Russia

Microscopic yellow grains, with realgar, on tiny gravel fragments. Too tiny to see in the picture, sorry! 10X magnification is enough to see the grains.