Trio of Morgan round crucibles - one marked E, one marked F, one unmarked.
Used for the analysis of precious metals by the fire assay method.
The crucible marked F has a large chip on the rim and some smaller nibbles.
The crucible marked E has a large chip to the rim and a large flake chip off the base.
Unmarked crucible has a large chip to the rim and smaller nibbles to both base and rim.
All around 13 cm tall with a 7.5 cm diameter at the rim. Slight variance in size between the three.