How hot must it be to melt diamond mineral?

Just pondering...

If I could just wish to make a powerful weapon, then I would make a diamond kendo stick. But even if I was to somehow obtain that much mineral (which is when pigs not only fly, but when they rule this world), I still need to melt them.



So I was just wondering how hot should it be to melt a diamond?How hot must it be to melt diamond mineral?
Diamond is made of pure carbon. If you heat it, it will burn clean-- not even leave ashes. It will turn into carbon dioxide gas. It will *not* melt!



Antoine Lavoisier did an experiment and found that diamond is made of pure carbon. He heated the diamond to 1500C and the diamond burned completely.How hot must it be to melt diamond mineral?
Your best bet=diamond edged sword made from titanium or something like that, it would be totally nasty, probably doable.How hot must it be to melt diamond mineral?
At normal atmospheric pressure, carbon does not melt. Like dry ice, it sublimates. In other words, it goes directly from solid to gas, without becoming a liquid. This happens above 4000 degrees K.