I was fortunate to exchange some insta messages with champion Pakastani stone lifter Jawad Ahmed.
He explained that the stone lifting he does is a cultural pasttime. He trains for the lifting using only stones (no barbells, dumbells etc).
The stones themselves look similar to what are known in Strongman as Atlas Stones. However, these round boulders are sources in the mountains. They retrieve very large chunks of rock and mechanically/physically turn them in to globes.
This is entirely different to the Western approach of pouring concrete in to a mold.
Another significant difference is that in Pakistan they carve two 6" slots for finger tips to be placed. These are in a standard position, parallel to each other.
Jawad himself weighs roughly 96kg at 5'8".
I hope you enjoy yhese two video showing different lifting styles. As well as a stone being weighed.