rare earth s . concept words rare earth s on beautiful white paper on wooden clothespin. beautiful grey

earth rare element metal chemistry laboratory scandium yttrium lanthanum praseodymium promethium ytterbium thulium lutetium erbium holmium dysprosium gadolinium terbium europium samarium neodymium cerium technology concept material mineral elementary group information manufacturing number science scientific chemical periodic substance transition valuable industry table actinium germanium tellurium uranium investment supply nickel ore trend