Yixing questions

[Fnord5]

Found one the other day, for a couple bucks.
Unglazed clay.
My dad was with me, and warned me off of it for fears of lead.

I know that unglazed terracotta will leach lead into food, how about the stuff Yixings are made of?

 

[P_K]

post a pic of it if you can. I don't think lead is a big concern. It would probably be some other heavy metal. Most people will tell you to buy a quality product from a reputable vendor and you will be fine.