Well, today as we walked into the office we were greeted by a fascinating looking diamond shaped stone with a depression in the middle of it. We’re a little stumped! We’ve gone through the possibilities; could it be a mortar stone or is it something else? Possibly part of a door hinge system? Photos below;
Opinions would be greatly welcomed as we can’t find an answer (it may be that the long weekend has turned our brains to mush…!).