User blog comment:Nxf11rocks/Original?/@comment-25156300-20140724234218/@comment-25156300-20140726031426

True, but seeing as glass has more silica than the other two components and silica makes up the majority of sand, then fire should have some effect. Though they never really say how hot their fire techniques get, so it probably wouldn't be hot enough ... Yay over-analyzation :D