There are those succinct phrases about things that are plentiful, like "sand by the sea". In our on-site report, we stop at the Quarzwerke Group in Haltern in Münsterland in the German state of North Rhine-Westphalia. The Haltern plant belongs to the Quarzwerke Group, which has its headquarters in Frechen near Cologne and has been active worldwide in the extraction, processing and refinement of the…