This is likely to be tricky to firmly attribute - it's relatively inexpensive to start producing pate-de-verre meaning there are numerous small studios capable of making such a piece. I have a suspicion that this vase is Chinese - China is the largest producer of pate-de-verre/ pate de cristal at present, however much of their output hasn't been documented and, due to the nature of the technique, it's easy for makers to produce small runs and special orders which don't appear in catalogues.
The colour and finish are certainly consistent with modern Chinese production, however the design is somewhat atypical as most Chinese pieces are influenced by ancient forms (i.e. Shang dy. bronzes, etc.); having said that, Liu-li story have recently started offering more European style forms like this piece and their output is typically unmarked, though, as I say, there are many other possible makers.
Steven