With help from his friend Jake Keen — an expert on ancient metal-making techniques — the author dug up 81kg of ore and smelted it in the grounds of his house, using a makeshift kiln built from clay and hay and fuelled with damp sheep manure.
Pratchett, who has Alzheimer's disease, also said he had thrown in "several pieces of meteorites — thunderbolt iron, you see — highly magical, you’ve got to chuck that stuff in whether you believe in it or not".
After days of hammering the metal into bars, he took it to a blacksmith, whom he helped to shape it into a blade, which was finished with silverwork.
http://www.news.com.au/technology/terry-pratchett-creates-a-sword-with-meteorites/story-e6frfro0-1225926584339 via Geekosystem | Photo by Flickr user David Jackmanson used under Creative Commons license
There is one here at the very end of the page:
http://www.paulkidby.com/news/apr2010.html
See it at your own risk, I warned you.