Great color combination.
The filigree/filigrana glass is a cane with a color inside. Usually clear on the outside with a core in colored or opaque glass. Most used are white or black filigrana.
This is a self-made filigrana as there is a green coating over an Amethyst core, making the Amethyst almost a dark bronze color. The other cane is clear with amethyst. The twisting (mena in muranese, or ritorto) makes a lay with the back of the vase almost as it is a reticello (once called filigrana, so that explains the term mezza filigrana).
The special color combination was then rolled over pure gold leaf, highlighted with the iridescence smoke and then covered with another layer of high temperature glass to make the gold vivid.

The vase is quite large and carries a squared mouth, in a way of Carlo Scarpa mezza filigrana vases. The base has an inside pinnacle to remind of the Murano vases of the early 20th century, in particular Zecchin.

Punty detachment has been cleaned. This is the only element to date the vase. Pre WW2 and after the 1980s punty detachment was left visible, in the first case because of the techniques in the second to witness the Murano handmade process.
Also the Gucci palette color combination of amethyst and green leans toward an 1980s decade making.

Attributing to Cenedese for similarity of other vases from Amelio Cenedese collection.
It’s a magnificent vase with a great technique behind that belongs to the decade of the roaring 1980s.

The measurements are showing width and dept. as corner to corner measurement.
Good condition, few bubbles trapped in the canes on a side (see photo).