Rock-Forming Processes - Crystallization and Precipitation

MINERAL- AND ROCK-FORMING PROCESSES - CRYSTALLIZATION AND PRECIPITATION 

Most natural solids, including minerals, are formed by one of two very different processes crystallization, which takes place when a hot melt cools down slowly, or precipitation, which occurs mainly when a solid separates from a water solution. 

Precipitation, the other process by which minerals and rocks are formed, takes place from a solution. When solid particles separate out from a solution as the water evaporates, or as a consequence of cooling or of the 

The Components of Materials. The composition of mosf materials -whefher of natural origin, such as minerals, rocks, wood, and skin, or made by humans, as for example, pottery, glass and alloys - includes several kinds of components major, minor, and trace elements (see Textbox 8). 

COMPOSITION OF MATERIALS MAJOR, MINOR, AND TRACE COMPONENTS 

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