59
chemical
chemical element
chemistry
earth
electronics
element
expensive
geology
grey
handful
high purity
highly pure
industrial
industry
lack
material
metal
metallic
mine
mineral resources
mining
nature
periodic table
pile
pr
praseodymium
pure
rare
rare earth
rare earth element
rare earth metal
rare earth mineral
rareearth elements
raw material
ree
resource
scarcity
science
silver
symbol
very pure
定額
REE - rare-earth element Praseodymium. A handful of silvery-white metallic powder and the chemical symbol Pr on a white background. Praseodymium is a rare earth metalの素材 [FY310204868949]
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