Thermoplastics, in basic terms, are melt-processable plastics (materials that are processed with heat). When enough heat is added to bring the temperature of the plastic above its melt point, the plastic liquefies (softens enough to be processed).
In the U.S., diamonds have been found in Arkansas, Colorado, Wyoming, and Montana. In 2004, the discovery of a microscopic diamond in the U.S. led to the January 2008 bulk-sampling of kimberlite pipes in a remote part of Montana.
Incomparable Diamond is another African diamond, one of the largest diamonds ever found in the world (890 carats (180 g)). A young girl encountered it in 1984 a pile of rubble collected from old mine dumps of the nearby MIBA Diamond Mine, Democratic Republic of the Congo.