Quick view Details Clay & Minerals | sku: CUSTER Custer Feldpar (potash) MSRP: Now: $1.50 Choose Options Compare Quick view Details Clay & Minerals | sku: MIN Minspar Feldspar (soda) 200 Mesh MSRP: Now: $1.50 Choose Options Compare Quick view Clay & Minerals | sku: CUSTER Custer Feldpar (potash) Custer Feldspar is a potash feldspar. Feldspar is a large group of minerals which have decomposed from granite and igneous rocks and are thus allied to clay. The main group consists of the alumino-silicates of potassium, sodium, calcium, and, more... MSRP: Now: $1.50 Choose Options Compare Quick view Clay & Minerals | sku: MIN Minspar Feldspar (soda) 200 Mesh alternative for Kona F-4 (no longer available) and NC-4 FeldsparSoda Feldspar is generally a clean white mineral which sources sodium, alumina and silica along with some potassium and calcium. Albite mineral from which soda feldspar is derived is often... MSRP: Now: $1.50 Choose Options Compare Compare Selected × OK School teachers or secretaries placing your first order PLEASE CLICK THE "TAX EXEMPT STATUS" LINK above and follow the instructions. We aim to provide excellent customer service to all potters who chose to shop with us, however, the areas we are able to serve best are in Kansas, Missouri, Nebraska, Iowa, Arkansas, Oklahoma, and Illinois. There are lots of great clay suppliers nationwide that probably do a better job of serving customers in states further away. If you would like help finding a local supplier, please let us know. We will be happy to assist you. Please note that we favor long term relationships with our customers over one-time transactions on our website based on a random google search result. We are not Amazon and don't want to be. We're a bit old-fashioned I guess...but with a website. This is a 40 year old family business, now being run by the second generation. We generally run on a staff of 10 or less, and we all work really hard. All employees here are treated like family...we DO also think of our customers as family, but that does mean if you are "tormenting" one of our "little brothers or sisters", we'll "ground" you. And if you're *really* naughty, you might get a policy named after you. So just be nice, ok? You be nice to us, and we'll do our best for you! That's a promise.