A cewar wata sanarwa da aka buga a ranar 8 ga Nuwamba, 2021, Cibiyar Nazarin Kasa ta Amurka (USGS) ta sake nazarin nau'in ma'adinai bisa ga Dokar Makamashi na 2020, wanda aka sanya shi a matsayin ma'adinai mai mahimmanci a cikin 2018. A cikin sabon jerin da aka buga, 50 masu zuwa. An ba da shawarar nau'in tama (a cikin jerin haruffa).
Aluminum, antimony, arsenic, barite, beryllium, bismuth, cerium, ceium, chromium, cobalt, chromium, erbium, europium, fluorite, gadolinium, gallium, germanium, graphite, hafnium, holmium, indium, iridium, lanthanum, rutin, lithium. Magnesium, manganese, neodymium, nickel, niobium, palladium, platinum, praseodymium, rhodium, rubidium, lutium, samarium, scandium, tantalum, tellurium, terbium, thulium, tin, titanium, tungsten, vanadium, ytterbium, yttulium, zinc,
A cikin Dokar Makamashi, an ayyana ma'adanai masu mahimmanci a matsayin ma'adanai marasa man fetur ko kayan ma'adinai masu mahimmanci ga tattalin arzikin Amurka ko tsaro.Ana ganin su a matsayin sarkar samar da kayayyaki masu rauni, Ma'aikatar Harkokin Cikin Gida dole ne ta sabunta halin da ake ciki a kalla kowace shekara uku bisa sabuwar hanyar Dokar Makamashi.USGS tana neman ra'ayoyin jama'a yayin Nuwamba 9th-Disamba 9th, 2021.