The site is called “La Pierre qui Tourne”, which would imply one stone – but there are two.

The stone on the left, broken at mid-height then repaired, is called “Pierre qui Tourne”. The stone on the right is called “Polissoir” (polishing stone). Both are made of landenian sandstone.
Strangely enough, the different narratives are sketchy and confusing ; we’ll limit ourselves to a minimum.
It is generally said that they have been found in 1868, nearby (and near each other ?) – but no plausible spot(s) has (have) been identified.
They have been first investigated in 1878 by Mr Van Bastelaer, president of the Archaeological Society of Charleroi – but there is not much trace of any report about the stones proper.
They have been erected to their present location in 1897 ; the “Pierre qui Tourne” was broken during WWI and repaired in 1920 – but even all that is doubtful, as the two parts do not match : the “Pierre qui Tourne” might be made of two distinct polissoirs arbitrarily assembled to match the other stone, today called “Polissoir” (polishing stone).
To complicate matters, an inhabitant who, to this day, has always lived next to this spot, teenager during WWII, maintains that both stones were retrieved from the forest during WWII, and that the break and the repair date from that time.
Photo taken April 2014.