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.
The Crown Jewels contain three of the most famous diamonds in the world. The first is the Cullinan I diamond also known as the âGreat Star of Africaâ and was actually cut from the biggest diamond ever found at the time and is 530.20 carats. It is mounted in the sceptre.