Buy Mikasa® Benson 16-Piece Dinnerware Set in Slate from $149.99 at Bed Bath & Beyond. With an organic stone effect design, the Mikasa Benson Slate 16-Piece Dinnerware Set is perfect for everyday dining. The ironstone pieces bring a clean, contemporary look and feel to any table.With an organic stone effect design, the Mikasa Benson Slate 16-Piece Dinnerware Set is perfect for everyday dining. The ironstone pieces bring a clean, contemporary look and feel to any table.