Dead Dwarves

I thought that, in this setting, when dwarves died that they turned to stone. Yet, on level 3B, room #13, there's a description of murdered dwarves and their equipment. It reads as if the bodies are still flesh and not stone, as indicated by the description of their equipment. Am i missing something? 

I played it as only their formerly flesh and blood bodies turn to stone. The equipment on them remains unchanged.

The way I ruled it was the same.  The equipment did not turn to stone.  However, sometimes that meant that you had to break the stone to get some of the equipment ( e.g. have to chipmaway or take off a few fingers if the dwarf was holding something).

Just another puzzle for the PCs to figure out.