Hi
I've had this vase for a while. It's cased glass (fairly thick and heavy). Cobalt blue with aventurine/copper/ gold flecks. It's 13cm high. The base is slightly concave, but within that the pontil mark itself is slightly raised/domed and its polished. Has a quality feel about it overall.
It might be too generic to identify, but I thought I'd see if anyone's got anything. I've seen similar sold as Murano ( often a vague attribution I know) but any thoughts...