I mentioned on another thread that I have access to farm land that sits within a few miles of the Spiro Mounds archaeological site near Sprio, OK. If you Google "Spiro Mounds" and do an image search, you will see some of the amazing ceremonial artifacts they found there when they excavated in the 1930's. Here is one picture of some of the points they found: ANYWAY... One of the fields that I have been spending some time in (hunting feral hogs) is laden with chert rocks of all shapes and sizes. I would be glad to pick some up if anyone is interested, but don't have any idea what size/shape of pieces folks would want. Many of the pieces that have not been broken are brown on the outside. I have found some white pieces and a few red pieces. Some of these may be jasper... just always lumped them together generically as "chert" over the years. Here are a couple of chunks I picked up this week... The piece at the top is larger than a softball. Knife is 6 1/4" long overall for size comparison. I would be glad to round some up if anyone is interested. I just need to know what to look for. I can fill small or medium flat rate USPS boxes for just the cost of shipping them. I'm already out there a couple of times per week and actually enjoy scavenging through the rocks.