code1949:
@Darkyhard!169205
Obsidian melts at almost the same temperature as quartz! Anyway, obsidian is technically a glass as it is an amorphous solid consisting of various minerals with a complex internal structure.
So Catelite is right!
Sand + Heat = Molten Sand
Molten Sand - Heat = Glass
A lattice of QRTZ and PTCT and BMTL can achieve what you need (you just need to attach a self-destruct mechanism to the PTCT).
Glass = Obsidian
code1949:
@Darkyhard!169210
The PTCT will rapidly cool it. The required heat to melt it is greater than 2500 if you are talking about an external heat source, if it still melts, add GoL cooling units, a FRZW freezer and a PBCN cooling unit.
I honestly have no idea why you need something that can withstand such high temperatures.