Is glass a conductor?
Glass isn't a conductor of electricity but a conductor of heat.
No. Glass is used as the OPPOSITE of a conductor- it is an insulator. This is the reason telephone poles used to use glass objects that looked similar to bells to tie the telephone wires to the poles. For a better conductor of energy, look to metals. Aluminum and copper are excellent conductors, as is gold.
Depends on the type of glass, but, loosely speaking, "glass" is an insulator. If it is an conductor of heat, it should have metals in it. Some might have oxygen present, which is melted at a very high temperature with soda, or limewater. The sand will mix with the metals (two of them) and form a shiny glass. This is very expensive.