07-01-2014, 03:15 AM
I don't know if it would work but I have sometimes wondered if you could take a combustible material such as sawdust or pulverized coconut fiber and mix into it ground up seashells or dead coral (calcium carbonate) and washed sand (salt removed) and then compressed it into a block, would you then have say a rectangular presto log that you could burn for fuel and it would end up as a square glass block. If the mix was right you could use the blocks to barbecue a steak and then use the glass blocks to build yourself a lanai. Probably a hair-brained idea but then again glass is basically just sand and lime. My guess is that the carbon residue would probably make for pretty crumbly glass.