found a mushroom shaped cement type marker can anyone identify what this is?

PlaneDiggerCam

Well-Known Member
CanadianBottles is 100% correct. These are stoppers to big chemical demijohns. It's some sort of composite pottery-like material that is designed to be unaffected by whatever was in the demijohn.
I second this. These are demijohn / large stoneware jug stoppers.
 

Members online

Latest threads

Forum statistics

Threads
78,944
Messages
713,609
Members
20,210
Latest member
crdphilly
Top