I don't know much about Formentello. I googled "Formentello Murano" and got a few links and learned a little about the Formentello family. I would write it all, but I know you can get the same information. I was delighted to learn that the family is so important. One of the companies was Formia, a company that makes some great birds! The family is apparently considered very well in Murano. There is a bit about Angelo Formentello. I'll have to read a lot more about this family. I'm afraid I don't know enough about contemporary Murano companies.