I've a very large scavo vase shaped a little like a Chinese moon flask. It's a densely speckled blue glass, cased in clear. It has a ground base and top rim. The scavo decoration is a little iridescent.
Pretty sure it's not Cenedese, as their scavo wares tend to be uncased and fire-polished to the rim. I've had a few Seguso Vd'A items that are similarly cased, ground, and with iridescent scavo, but nothing in this speckled glass.