Is glass a heat conductor or insulator?

Answer:
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.
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Contributor: Mathegenius
First answer by Rrin. Last edit by Mathegenius Chew Jian Yue. Contributor trust: 12 [recommend contributor recommended]. Question popularity: 5 [recommend question].