I bought my Nuummite off of eBay but found later a website shop that was selling Nuummite slightly cheaper than anything I saw on eBay. Here's the link:
http://www.exquisitecrystals.com/pro...erals/nuummite
There might be some cheaper on eBay now I cannot say for sure cause I am not watching the Nuummite market on eBay anymore since I already bought a piece. But that site was selling a piece larger than mine for cheaper so it's worth checking out I guess.
I keep my Nuummite on me constantly but I wish everything Neville said about it is true. I still get "negative" attacks with it in my pocket as I sleep, maybe the entity found a way around it. Or maybe it needs to be cleansed and charged, it's been awhile since then. I haven't seen any rough Nuummite around I think it's best to get a tumbled piece but I am not sure.