Thanks Kevin for the move.
Chopin-liszt, I do love Murano but out here in Australia, so much glass is misattributed and I don't know which books to start with and they're not a cheap thing to be buying and *hoping* they're decent!
I do have a couple of Cenedese geodes (confirmed, have seen others signed and stickered) with a very similar colourway, which I why I originally leant towards Daros however this is the reply I received from Cenedese:
Dear Mr. Morant,
Thank you for your email and attached photos.
Please be informed that we exclude the possibility that the piece may have made at Cenedese.
Sincerely,
Ars Cenedese Murano srl
Dangit! The search continues!