Hi, any help with this vase much appreciated

It's 13cm high and has a faint hue of blue - there are small patches of iridescence inside- perhaps a sign of age? It was very dirty when I bought it.
It has a flat polished base ( quite a lot of wear ), otherwise I'd have gone down the Whitefriars route.
Its rim is inverted - if that's the right term.
Thanks for looking
Scott