English-language edition of Jean-Louis Moreau's company history, published to mark the 140th anniversary of Sibelco, founded in Belgium in 1872. The book was published simultaneously in English, French and Dutch. Building on Sand traces the development of Sibelco from its origins as a Belgian silica-sand producer into an international industrial minerals group. The narrative begins with the discovery and exploitation of high-quality quartz sand in the Campine region, particularly around Mol and Dessel, where the deposits supplied glassmakers and other industries. It describes the company's early mechanisation, technical innovations in mineral processing and expansion into international markets. As transport costs and changing market conditions affected the traditional sand trade, Sibelco expanded through acquisitions and developed a broader portfolio of industrial minerals, including quartz, feldspar, clay, kaolin and other specialised materials. The book places the company's evolution within the wider history of Belgian industry, technological development and international business, documenting the growth of a regional mining enterprise into a multinational supplier of mineral raw materials. (AI-generated content description)