SolGold, an exploration company focussed on the discovery and definition of world-class copper-gold deposits, failed to acquire Cornerstone Capital Resources, a company that offers exploring for precious and base metals, industrial minerals, and rare earth elements, for $102m. SolGold was unsuccessful in its unsolicited offer to acquire all of the issued and outstanding common shares of Cornerstone. Hostile Bid expired on October 14, 2020, without any Cornerstone common shares being taken up.old CEO.