| Not to mention rare elements such as lanthanum, cerium, and neodymium, essential to modern technology and commanding high prices. |
| They are composed of iron, boron and neodymium, one of the rarest metals on Earth and their strength range from 2000 to 3600 gauss. |
| The inclusions crystallize at the same time as the host diamond and incorporate trace elements such as samarium and neodymium, which may be used for radiometric dating. |
| We see cerium, lanthanum, neodymium, and so forth, which indicate we are dealing with a rare-earth mineral, and that can mean big problems. |
| Didymium itself, meanwhile, was revealed as a phantom, a mixture of two new elements that Karl Auer in Austria discovered in 1885 and called neodymium and praseodymium. |
| The periodic chart developed by Russian chemist Dmitri Mendeleev showed that an element should be found between neodymium and samarium. |
