A 0.25 ct. or larger round, square, emerald, oval or cushion shape stone can be set with this ring. Classic Emerald Ring With Single Diamond, Classic Rose Gold Solitaire Stackable Rings, Formal Princess Cut Emerald Ring, Classic Solitaire Square Cut Ring, Classic Cushion Cut Diamond Promise Ring, Classic Birthstone Ring With Center Stone, Rose Gold Solitaire Emerald Ring, Timeless Cushion Cut Ring With Center Stone, Formal Solitaire Emerald Ring With Princess Cut