Hi guys I'm looking for some burlington chert or some obsidian about 30 lbs would be plenty. I've got goose and turkey feathers, some really nice metamorphosed rhyolite for knapping. Its the grey and green very smooth textured stone and it works like chert. Not as tough as the waxy variety of rhyolite many people try and get soured on. Also have other things to trade let me know what you may want. Thanks