I think the bowl in the link is opalino. Opalino and alabastro are two different types of glass. Alabastro is made to resemble alabaster rock. I have a few pieces of it. The glass, though smooth, looks grainy inside. Alabastro is more opaque than opalino. Alabastro is a thick, sticky glass that tends to crack, especially when cased. So alabastro is usually not cased. Opalino often is. Hope this helps. Try googling Archimede Seguso alabastro and you should see a few examples.