Fort Payne/Muldraugh chert hand picked for knapability. Mottled and variegated tan, brown, orange, cream, pink, red and greys. Much of it is fossiliferous with sponge spicules, which give it it's characteristic mottled appearance, and some bluish quartz vugs/inclusions add to this materials desirability. Only higher quality slabs and pieces selected, grainier pieces rejected, but expect variability as with any knapping stone, not all may be usable, but you will not get a box of useless sandstone as a lot of buyers of lower priced material from other suppliers seem to be complaining about. Turns to beautiful pink and reds when heat treated, with a nice waxy quality and improved workability, but knaps nicely without treatment. Medium to fine grained. Each piece "chip inspected" and freeze fractured stuff rejected on sight. I probably reject over 90% of what I look at. From the Knobs region of Northern Kentucky and Southern indiana, the most widely used prehistoric material in this area and the top chert type from the famous Caesars Archaeological Project here. Ft Payne is a widely used material in Tennessee and Alabama, but Muldraugh is a unique variety of it only from our area, named after a Mississippian age geologic formation. It is not nodular, but occurs as lenses and beds in a soft usually orangish siltstone. Collected by avocational archaeologist/knapper (myself) from local creeks and native quarry sites. I actually have an outcrop/quarry site on my property, a recent box I sent out had a couple of prehistoric preforms included. I send all I can fit in a USPS medium flat rate box, 20-23 lbs. I love this material, as did the natives, and have found Paleo thru Mississippian artifacts made from it. I honestly want to share with others what I am blessed with. I don't make much on a box and it takes quite a while to put a box together (it ain't worth it!) but I enjoy doing it. Thirty five years experience, I am very conscientious as to what I select. Check out the latest reviews we've received on this and our Harrison Co flint (sold out). One guy had a box bust open when we first offered this and gave a negative review so we now wrap in plastic in an insured medium flat rate box with box reinforcement and tons of tape. Thanks for looking!