Hello Sheila,
What an interesting piece. Are the facets definitely cut - crisp sharp edges, or could they be moulded? A photo of the base may be helpful, even when it isn't marked. I have been amazed how much other members can tell from a slight bevel on an edge!
Some Sklo Union moulded pieces can look like hand cut crystal, but I haven't seen anything with such a free form looking top as yours. Round facets appear on Borske Sklo pieces, and they have some more free form looking shapes. Anyway, will wait to hear back.
It'll probably turn out to be murano 😹
Cat