A cewar wani rahoto da aka fitar a ranar 8 ga Nuwamba, 2021, Hukumar Binciken Yanayin Kasa ta Amurka (USGS) ta sake duba nau'in ma'adinan bisa ga Dokar Makamashi ta 2020, wanda aka sanya shi a matsayin ma'adinai mai mahimmanci a cikin 2018. A cikin sabon jerin da aka buga, an gabatar da nau'ikan ma'adinai 50 masu zuwa (a cikin jerin haruffa).
Aluminum, antimony, arsenic, barite, beryllium, bismuth, cerium, cesium, chromium, cobalt, chromium, erbium, europium, fluorite, gadolinium, gallium, germanium, graphite, hafnium, holmium, indium, iridium, lanthanum, manganese, neckium, neckium, magnesium, neckium, lithium. Niobium, palladium, platinum, praseodymium, rhodium, rubidium, lutetium, samarium, scandium, tantalum, tellurium, terbium, thulium, tin, titanium, tungsten, vanadium, ytterbium, yttrium, zinc, thulium.
A cikin Dokar Makamashi, an bayyana muhimman ma'adanai a matsayin ma'adanai marasa amfani da mai ko kayan ma'adinai da ke da mahimmanci ga tattalin arzikin Amurka ko tsaro. Ana ɗaukar su a matsayin sarkar samar da kayayyaki masu rauni, Ma'aikatar Cikin Gida dole ne ta sabunta lamarin aƙalla duk bayan shekaru uku bisa ga sabuwar hanyar Dokar Makamashi. USGS tana neman ra'ayoyin jama'a a tsakanin 9 ga Nuwamba zuwa 9 ga Disamba, 2021.