The term "Schiefer und Co" refers to Schiefer & Co., a company that is the oldest northern German precious metal recycling and refining establishment north of the Elbe River. Founded in 1923, Schiefer & Co. is based in Hamburg and has a long tradition of partnership with the Hamburg gold and silversmith guilds. The company offers a comprehensive recycling and refining process for precious metals such as gold, silver, platinum, and palladium, supplying materials and services particularly for goldsmiths and the jewelry industry. They handle trade in common investment metals, produce alloys, and provide expert services like jewelry galvanization and precious metal recovery. They serve both commercial and private customers with buying and recycling precious metals and related products. Their reputation is built on expertise, tradition, and reliability in the field of precious metal processing and trade.

In addition, the company is noted for being the only northern German firm selling Fairtrade gold, supporting socially responsible mining cooperatives, especially in Peru and Finland, contributing to better living conditions for miners.

Thus, "Schiefer und Co" (Schiefer & Co.) is a prestigious, historic precious metal refining and recycling company located in Hamburg, Germany, with strong ties to the jewelry trade and a focus on ethical sourcing of materials.