Jan 01, 2006· Kaolinite is the dominant mineral present in these Georgia and South Carolina kaolins, generally comprising more than 90% of the mineral content (Murray, 1976).Other accessory minerals that are commonly present include quartz, muscovite, biotite, partially altered feldspar, and smectite along with minor amounts of halloysite, magnetite, ilmenite, rutile, anatase, zircon, tourmaline, and a few ...