X0206 3 2018-05-30 1 0001722287 Unimin Corp CVIA 0001738049 Eich Andrew C/O UNIMIN CORPORATION 258 ELM STREET NEW CANAAN CT 06840 1 1 0 0 See Remarks Mr. Eich is the Senior Vice President and Chief Commercial Officer and director of Unimin Corporation (to be remained Covia Holdings Corporation, the "Company"). Upon the closing of the business combination between the Company and Fairmount Santrol Holdings Inc., Mr. Eich will become Executive Vice President and Chief Financial Officer of the Company and will no longer be a director of the Company. Exhibit 24 - Power of Attorney /s/ Andrew D. Eich 2018-05-30