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“Tamarugite Crystals left white ,Glauberite white/clear top further Yellow Sideronatrite Crystals all on coal , p.w. 0.59 mm , coll.& photo Ko Jansen. For more info see Mineralien Welt 4/2016 pages 67,70,71 and 72.”
Ko Jansen - 11th August 2016
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