TAPIO WIRKKALA NEODYMIUM.The glass is neodymium. The glass changes from the pink to blue in fluorescent light. It's signed on the bottom TAPIO WIRKKALA 3539. I like the combo of pink and blue and have put it with another two vases that I will post soon. It stands 17 cm/7" tall and is 10.5 cm/4.125" at its widest and 7 cm/2.8" at the base. This glass is called Neosin and appeared in the Iittala catalogue between 1966-69.