Welcome to the board Yolanda.
This vase looks Italian to me and I think it contains some uranium glass - the yellow green layer. if it is uranium glass it will glow a bright green colour with UV light (blacklight).
Glass in this style is often known by the Italian term sommerso, (submerged in English) and refers to one colour being contained within another - this vase has amethyst glass surrounded by uranium glass.
John