Hello Chris - assume your friend was implying 'for growing tulips' - which it certainly wouldn't be
I'd suggest a carafe, in view of the absence of wear inside the neck - but just as a comment, there are many true decanters without matching nos., so that fact on its own wouldn't rule out a decanter.
It's quite possible that the two pieces you've shown are close in date - the smaller piece with the stylized acanthus leaf might possibly be a little earlier at c. 1880/90, but there's no reason why they couldn't be similar in age - but more difficult to date the carafe.
Wheel engraving has been around for a long time, and you'd need to look at other features to help date the carafe - the quality of which looks quite good. You don't mention wear.
I don't know whether to think there's a similarity regarding the leaf design or not - could be the engraver had an acanthus leaf in mind - but other than that I really don't think there's a connection between these pieces, and although the smaller one might have a Stourbridge pedigree, the carafe could be from anywhere.
regret this not of much help

As a suggestion, it may be better to avoid the use of the word Ivory when speaking of these C19 pieces with a uranium content - just in case there's confusion with Sowerby's Queen's Patent Ivory Ware.
Not that there should be, but people can sometimes pick up the wrong idea just from a brief description,
and always the potential to confuse the Board's search archive.
