I'm not sure what the wood is, but it is dense and very heavy. I was hoping for Desert Ironwood, but think I got something in the Rosewood category. Still makes a nice pen. It was in a Terrarium at a flea market.
sweet pen, i got a piece of bog pine in one of our flea markets. The guy said it was bog oak treated for a fish tank, the fool, didn't have a clue what it was
There's also a wood I've never been able to get ahold of (Griffin Exotics has a listing for it but it's always sold out) called Desert Rosewood. Could be that also.