Clay is a fine-grained (small particle size) sedimentary rock. Clay is so fine-grained it is rarely possible to see the individual mineral particles with the naked eye. The definition of clays describes rocks with particle sizes of less than 4...

Clay is a naturally occurring material, composed primarily of fine-grained minerals, which show plasticity through a variable range of water content, and which can be hardened when dried or fired. Clay deposits are mostly composed of clay minerals...

Medical personnel are taught that geophagia (eating clay or dirt) is a sign of dysfunction, associated with mineral imbalance, such as iron deficiency, but some clays have had a traditional place in detoxification and nutrition. Observers have noticed that both humans and animals...

Sales of ball clay again reached record high levels during 2000. This was tempered by the fact that with the economy slowing, sales in 2000 were only slightly greater than in 1999. The largest gains in sales were for sanitaryware and tile applications. ...

Roger Federer has stepped up his clay-court training, and it showed Tuesday as the top-ranked tennis star beat Nicolas Almagro 6-3, 6-4 in the second round of the Rome Masters, a year after struggling to a three-set win over the Spaniard.Federer converted breaks early in...

The men's tennis tour moves to clay next week, and for Roger Federer, the surface looks more treacherous than ever. Playing on dirt is all about grinding and grunting and groundstrokes _ the sort of challenge that suits someone like, say, Guillermo "Willy" Canas.If Federer...