Hi, iam George Kocon, You have yourself a good one!

What Cannot Melt In Lava? [Solved]

Well, bottom line is that the lava’s heat just ain’t hot enough to melt tungsten - it’s got a high melting point. But there are other materials that can handle the heat, like titanium, iridium, iron alloys, osmium, nickel alloys, aluminum oxide, mullite and silicon nitride.