Glass isn't crystalline, it's amorphous. I thought it would have a much lower melting point than sapphire as a result, but it turns out the difference is not n

Glass isn't crystalline, it's amorphous. I thought it would have a much lower melting point than sapphire as a result, but it turns out the difference is not nearly as big as I suspected, 1400-1600C vs 2000. TIL.