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Optical micrograph of Halloysite [Al2Si2O5(OH)4] in 'P-0433 Halloysite' standard (CSIRO) from Beez, Namur Province, Belgium. Instrument: Olympus BX-51. Date: November 2024.
White globular aggregate of the very rare Mg borate halurgite from the type and only known locality worldwide: Chelkar Salt Dome, Aksai Valley, Shalkar, Aktobe Province, Kazakhstan. Ex Vandenbroucke Museum collection from Waregem, Belgium.
UV fluorescence image of hardystonite (blue), with clinohedrite (orange), calcite (red), and willemite (green), from Franklin, Sussex Co., New Jersey, USA