Stone objects, man made or not? Archeologist opinion?

The images below show two stone objects found digging a trench in the yard. Distance from nearest man made construction about 2 m, depth around 60 cm, in undisturbed heavy soil. The objects formed a cluster, and they were the only ones of this type and size in the dug out area of about 25 cm by 25 cm.

Right next to the stone objects were small black lightweight objects that appear to be charcoal.

Object 1
The object was hit at the lower edge, visible near the 195 cm mark. This broke the object into two fragments. Near 193 to 194, there is a break indicating there is another piece missing.

Along the top in this image, Object 1 has a sloped very sharp edge which we have tried to photograph here:

Object 2
This one fits into the palm and looks really interesting.

Here is a photo of the reverse.

Object 3
Lightweight, certainly not stone, slightly flaky just like charcoal with a corresponding weight. Found right with Object 1 and Object 2.

The digging was done in the rain, and there was no incentive to broaden the work area.

About 100 m or so away, some Celtic stone tools were reportedly found a few decades back.