From The Crop Circle Ship Wiki
Later on in a more external layer of the Watersphere, the Hydrogen is joined back with Oxygen once again to form Water, where we see the depiction of Water is different to what it was when it first entered. See the Watersphere Process in 1995.
Below, two streams of Microwaves and Water are showing entering the Octahedron. It is uncertain if this process occurs inside the Inner Pyramid Core or just inside the general area of the Octahedron itself.
A formation just a few days later shows the separation process of elements Hydrogen and Oxygen from Water. A pattern in the formation below is also present in a design by Nikola Romanski. Note that the square design below is also a clear representation of the Octahedron.
 Additional formations
 Also see