After eight centuries of Murano glassmaking, a gas crisis is threatening its future

[CentralMass]

1. I wonder if it possible to use small RF (radio frequency) furnaces to heat the glass ?

SNALL rD furnaces are used in the fiber optics industry to heat optical preforms * glass rods that have been fabricated with deposited layers to create a wave guide) to a molten point.

https://mo-sci.com/electric-furnaces-future-glass-manufacturing/#:~:text=The%20thermal%20efficiency%20of%20gas,raw%20materials%20to%20molten%20glass.&text=All%2Delectric%20furnaces%20are%20also,use%20around%2035%25%20less%20energy.

A related link.(for reference only)
https://www.stanelcorftechnologies.com/fibre-optic-technology/