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Minerals and crystals including kyanite, asbestos and andalusite.. Chromolithograph from Dr. Adolph Kenngotts Mineralogy section in Gotthilf Heinrich von Schuberts Natural History, Schreiber, Munich
Plate 10, fig 2 from MineralienbuchAn illustration of an andalusite mineral deposit showing columnar crystals. Plate 10, fig 2 from Mineralienbuch by F. A. Schmidt, Stuttgart 1855
Chiastolite
Andalusite cut stoneAndalusite is an aluminium silicate. It shows spectacular red and green pleochroic colours