As some of you may recall, I inherited several buckets of "raw materials for stoneware glaze" from an old, retiring potter.  The advice received on this forum, when I asked "what can I do with them?" was to give them back or get rid of them asap.   The raw materials that I owned were: Bentonite, Nepheline Syenite, Mag, Alumina, Black Ball Clay, Feldspar Potash, Talc, Quartz, Dolomite, CC China Clay, and “No label†which on testing, turned into a blue-green glaze at ^8.  I also acquired Red