Breaking a stone of this size clearly requires more strength than the base 101 tons that Striker scales to.
Here, Millie's height was calculated as 1.28 meters.
Judging by the scene where the cowboy pulls out the stone, the area of the stone is a circle, a little crooked, but not much. Therefore, it is enough for me to know the diameter.
And no, this is not a joke, I actually got that the diameter of the stone is 666 pixels. A funny coincidence, considering what kind of verse it is.
Diameter = 1,28347872802 / 589,6 × 666 = 1,44979110051 meters.
Thanks @TheRustyOne for idea.
Diameter = 382.1 pixels.
Area = 98395 pixels square.
Stoloctid area = (1.44979110051 / 382.1)^2 × 98,395 = 1.41654316768 square meters.
As I know, fragmentation = tensile strength.
Force = 1,41654316768 m^2 × 8,000,000 Pa / 9.8 N / 1,000 = 1156.36176953tons (Class M).
This updates them, cool.