Glass completely melts at 1400–1,600 degrees celsius. When lava erupts from the vent, it is 700–1,200 degrees celsius. So technically we should be able to contain lava in glass. However, glass can be molded at 590 degrees celsius, meaning that if we try to contain lava in glass, the glass would just lose shape quickly. read more
I know that lava can form glass, but I need to know if it melts glass that someone puts in it. read more