The separates alone are only the beginning of soil textural study, since they are not found pure in nature but are always mixed. It is the natural mixture found in the field and known as soil classes - sands, loams, and clays - that are important. 
 
Set of eight glass jars in thermoformed plastic tray. 
 
Includes sand, sandy loam, clay loam, peat loam, silt loam, loam, clay, and muck.