Cast iron fire insert and surround, not sure of the material of the surround looks like some sort of resin maybe. Stone effect.
I grafted an electric fire in it for occasional use and works well as is but you would need a recess for it to fit.
2 speed flame effect.
Or return to use as open fire. With original grate.
Quite heavy you would need suitable transport I would help my end.
The room it is in is to be the kitchen reason for sale.
£200 for surround and cast insert + £50 for electric fire