Analcime – Duingen Clay Pit near Alfeld/Leinebergland, Hildesheim District, Lower Saxony, Germany
 
Well-defined colourless to milky white analcime crystals, as typical deltoidicositetrahedra of 4-6 mm size on massive light brown ironstone. A German classic! Historical find in March 1974, ex collection Max Pohl/Hanau