The vase itself is a sort of swirly amber colour - with darker brown swirls in it, not too different to Davidson Cloud glass, but an ambery colour rather than brown - and much thicker.
I'm sure it was done with coloured glass, not with the use of saltsto produce colour. I don't remember much evidence of age-related wear. The iridescent blue glass is also very thick and blobby. It looks the pretty much the same whether light is coming through or reflected off it.
The base finish was somewhat haphazard, geared to what they had to work on, not aspiring to anything consistent or routine.
It looks just like the pictures, and it doesn't change much, even when you've got it in your hands and move it around.