Again thanks for all the input, I hadn't thought of using a UV light and was amazed to find that the green speckles throughout the vase glow. Am I right in thinking that the vase must have some age to it if it includes uranium 'bits'. I googled Oiva Toikka, and this vase has almost identical colouring, but the only Tahiti designs that I could bring up on the net all seemed to have angular shapes whereas this vase is round. After reading the link I had a wee chuckle at Franks comment that they were attributed to Monart, thats why I ended up buying it!!
Thanks everyone, D