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).
Where diamonds are found in the United States - Wyoming. Diamond Kimberlite pipes have been found in Wyoming, near the Colorado-Wyoming state line area referred to as the Aultman, Ferris and Schaffer kimberlites. The Herkimer Diamond Mine and the Ace Of Diamonds Mine - New York.
SLIDESHOW: 910-carat diamond found in southern African kingdom The largest diamond ever excavated is the Cullinan Diamond, a 3,106.75-carat gem found in Cullinan, South Africa, in 1905. The diamond, which is also known as as the Star of Africa I, was cut and used in the British monarchy's crown jewels. Letseng is the same mine where the 603-carat Lesotho Promise diamond was discovered in 2006, Elphick said.