Measuring 2×1.9x1cm and with its red arrow pointing to the chalconatronite, this specimen would seem like a micromount. The red arrow, however, is unnecessary, as the rare carbonate chalconatronite covers a sizeable portion of the specimen and is more than apparent without any magnification. Notwithstanding, about 30x is required to appreciate that the chalconatronite is crystalline. This specimen was previously owned, presumably in conjunction with research, by the American Museum of Natural History.
Albite Amethyst Analcime Anatase Anglesite Aragonite Azurite Barite Brochantite Calcite Cassiterite Cerussite Chabazite Chalcopyrite Chrysocolla Copper Crocoite Cuprite Dolomite Fluorapatite Fluorite Galena Goethite Gold Gypsum Hematite Hemimorphite Libethenite Magnetite Malachite Mimetite Natrolite Phillipsite Pyrite Pyromorphite Quartz Siderite Silver Smithsonite Smoky Quartz Sphalerite Thomsonite Unidentified Species Wavellite Wulfenite