Victorian purple art glass biscuit barrel with silverplate lid

Here is a very interesting Victorian biscuit barrel which I picked up cheaply on eBay AU.
I know there's a few biscuit barrel fans out there, so hope you enjoy it, folks!
The decor is one I've not seen before, a very fine swirling, streaky spatter which looks kind of galactic. Like those time - lapse photos of stars. Perhaps it is an imitation stone type glass. Interior is an intense, dark ultramarine blue. It is very heavy, thickly cased glass, completed by silverplate fittings which are in good condition for their age.
Large, neatly polished out pontil mark on base. The barrel measures around 10.5 cm tall minus the handle.
No idea of a maker but I feel most likely English origin, late 19th century.