Florida Geological Survey - Geology Topics
Kaolin is a soft, lightweight, often chalk-like sedimentary
rock that has an earthy odor, and in Florida is generally
light in color and associated with large amounts of quartz
sand. Kaolin is composed chiefly of the clay mineral
kaolinite, the crystals of which are so small that they can
be seen only under the electron microscope. Kaolin is
generally quite porous and will stick to the tongue; it also
has the distinctive property of slaking or disintegrating
rapidly when placed in water.
Occurrence: Florida has a very large known
reserve of Kaolin, the largest deposits occurring in the
east central part of the State from Southern Clay County to
Northern Highlands County. A smaller deposit occurs in
west Florida in a narrow belt extending from Jackson County
into Santa Rosa County.