Probably exhausted my experience on these already, but..................similarly coloured pieces, often on white/pink/green/yellow grounds were very common in the U.K. some few years back, and often bought/sold as Italian or Scandinavian. They appear to have been described as 'Snowflake' vases - although I'm not sure if that was a company name or a reference to the type of decoration. See the attached link..........
http://www.glassmessages.com/index.php/topic,47453.msg267008.html#msg267008As you can see, the abstract decoration seems mostly to be some type of swirl, unlike yours on which the applied colour is more akin to splashing or splattering. As with most things, when you are desperate for a quality attribution you end up with Woolworths - the good stuff comes only, it seems, when you least expect it.
A year or two back you'd have had several folk already telling you it was Chinese - the fact that you haven't doesn't necessarily mean you've something better - nonetheless I wouldn't hold your breath on this piece.
The correct answer might lay in the finish of the base - we need someone with experience of these pieces - both the good and the bad.
Whatever it is, it's attractive, which may explain why they have been made in so many different countries over the last half century.