X0206 3 2018-05-30 1 0001722287 Unimin Corp CVIA 0001738052 Jones Campbell C/O UNIMIN CORPORATION 258 ELM STREET NEW CANAAN CT 06840 1 1 0 0 See Remarks Mr. Jones is the President and Chief Executive 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. Jones will become Executive Vice President and Chief Operating Officer of the Company and will no longer be a director of the Company. Exhibit 24 - Power of Attorney /s/ Andrew D. Eich under a power of attorney 2018-05-30