The Stone Forge was one of many elemental Reaver forges that were supposed to make an appearance in Legacy of Kain: Soul Reaver.The forge was a special chamber where Raziel would be able to imbue the Wraith blade with elemental Stone forge the Stone Reaver enhancement. Due to the time constraints, all of the other forges were cut and only the Fire forge remained in the final version, with both the Stone Reaver and Stone forge removed.
Despite its removal, the Stone Reaver enhancement itself is present in the Debug menus of the retail game and can be activated through these means. The forge itself is not present in any capacity in the retail or beta version of the game, however, it was present in the alpha version of the game publicised in 2020, which revealed that the forge was originally found in the Ruined City, in the courtyard area past Dumah´s throne chamber. Raziel needed constrict to open its door.
This chamber was fully textured with the stone like textures and it contained a stone pedestal at its end. It is possible Raziel would have to strike the stone with the Reaver to obtain it´s power.
In the retail version, this was replaced with a large, elongated hall with two Turelim and a health upgrade at its end.