hi Keith - attractive bottle

I could be wrong, but to me this appears to be an example of 'flashing' - rather than staining (staining was the cheaper, but less permanent process used by early Islamic decorators and revived by Egermann around 1820 ish)........... if it is flashing you should be able to see a very thin, but noticeable thickness of ruby, and was popular around the middle third of the C19. Staining I'd imagine shows the scratches and knocks a lot quicker and easier to see, in the form of missing colour.
According to McConnell, flashing was a Roman technique, which was revived in Bohemia around the same time that Egermann was starting his revival of staining - so it goes back some way, and apparently not easy to tell the difference between Continental and UK pieces. Bacchus, apparently, became the best known and leading British maker.
I'd suggest your decanter is a shape known as 'perpendicular cylinder' with spire stopper - a style fairly common in Bohemia and Britain (the spire stopper seems to have had a long run for its money, and appears not to have been confined to these two countries - so not much use in helping with an accurate date or origin).
I don't get the impression that either France or Belgium are known particularly for either flashing or staining, but apparently some very attractive cased bottles did originate from France during the period in question, and these are very attractively decorated with gilt etc.
I'd suggest this piece is C19, but beyond that wouldn't care to speculate. My eyesight not good enough to challenge m's counting of the arms of the star, but can say that the 32 point example is indicative, apparently, of 1840 - 50, although as we know, decorative features have been copied ad infinitum and this particular feature may not be proof of authenticity, and I've no idea how universal this rule of dating by number of radial arms, really is.
As regards the 'bloom', you might try putting your balls inside together with some metal polish and shaking vigorously for a while - might make you feel a little giddy - temporarily - but hopefully should reduce the slight opaqueness - not crizzling, by the way, that is something different entirely.

attractive find by the way.

Ref. 'The Decanter - An Illustrated History of Glass from 1650' - Andy McConnell - Antique Collectors' Club - 2004.
Regarding the