U.S. Mine Corporation's Ione Airfloated Kaolin Clay is a western U.S based deposit (California) suitable for calcining as a metakaolin and used in high-strength cements. It is available in 50 lb bags, Supersacks, and bulk. SiO2 47.0% Al203 36.31% Fe203 0.55% Ti02 2.4% Ca0 0.05% Mg0 0.03% Alkalies (Na20, K20) 70 Moisture Content (dry) %