Eich and Dönstedt - the two large, directly neighbouring quarries are appropriate for approx. 1.5 km northern Bebertal (Alvensleben), approx. 6 km southwest Haldensleben. A Paläoandesit is operated and particularly in the Quarry Eich is this rock richly on up to 30 cm large nodules. They contained beside quartz - frequently as smoke quartz or amethyst formed - Hematite, Calcite, Siderite and barite also very beautifully banded agate in white, pink to red colours, whereby much brightened with strongly colored bandes several times alternate.
Further data to the place of discovery is given at R.Haake, “agates collect in Germany, part 1” page 69 (Bode publishing house, 2000)