Mineral sediment cluster "Quartz & Carbon"
Piesberg, Osnabrück, Germany, private collection from Netherlands.
Gorgeous quartzite sandstone and claystone cluster with curious embedded carboniferous coal seams. The condition of the sample is good. Age-related wear, fractures and minor cracks may appear. Dirt and dust may exist. Size approx. 7,5cm x 4,8cm x 4,3cm. Weight c. 177g.