In-state companies encouraged to use Minnesota-mined minerals A resolution introduced by an Iron Range legislator in the Minnesota House of Representatives calls on Minnesota technology and medical companies to utilize Minnesota-mined minerals when manufacturing products. âWhat we need starts with us mining the critical minerals in northeastern Minnesota,â Rep. Spencer Igo, R-Grand Rapids, said of his HC 6 resolution. âIt (the resolution) encourages Minnesota businesses to innovate and work with the mining companies to field and produce their products here.â Northeastern Minnesota minerals such as iron, copper, nickel and others, should be mined under high environmental standards and used domestically, Igo said.