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.
A partial list of famous diamonds in history follows. Name Uncut weight (carat) Cut weight (carat) Color Country/region of origin Description Image 26th Congress of the Communist Party of the Soviet Union 342.57 yellow Russia / USSR Mined at the Mir kimberlitic pipe (Yakutia, Russia) in 1980. It is the largest gem diamond ever found in Russia or the former USSR.