A white opaque pressed glass "double shell light" by Edward Moore & Co., South Shields, RD 107316 (registered 5 September 1888). Probably designed as a stand for twin night lights rather than as a relish or preserve dish.
The clear flint glass examples are not uncommon, but this is the first time I have seen an example in coloured glass.
According to Angus McDonald of the South Shields Museum, Edward Moore seems to have produced very few pieces in coloured glass, so do any GMB members have photos of coloured Edward Moore pieces to show, please?
(Permission for the re-use of the white opaque piece on the GMB granted by cleanglassdream).
Fred.