Cathy it is highly unlikely to be from Murano as they do molten glass into items, or in some cases use the blow torch to create beads. Your fused item can literally be made anywhere that there is a pottery kiln. So for example I have a fused platter from West Wyalong, NSW, Australia - a town of 2650 soe 300 miles West of Sydney. It is a road junction. I was astounded to find someone making glass there - but as Australian glassis the major part of my collection I had to buy the platter. The nearest substantial town is Forbes 106Kms(65miles) away. There is no way a glass maker could set up a furnace that far from a large population centre
Ross.