Kate, your vase reminds me much of some of the vases made by Huajun or Zibo of Shandong Province, China. I couldn't find your exact vase. Many of their vases are very heavy and the base glass is fairly well done. The filigrana usually has some problems in the execution -- too many bubbles, not quite parallel,wavy, or incomplete. I noticed the filigrana of your vase has a good many bubbles.
I do think your vase is Chinese. They often use the wrinkled look that the white glass of your vase has. If your vase is Chinese, I'm sure that we will run across another like it soon. :or: