It reminds me a little of Shakspeare glass (Will Shakspeare) - he did use an opal type appearance in some ranges (and particularly in a range called 'opals' which are absolutely superb and mesmerising in real life) and also that lilac.
However the base finish and the shape or rather the way it curves towards the base, are not really like his bowls I've seen.
It might be worth investigating a little further though.