alloy
aluminium
aluminum
big
brick
bullion
chemical
chrome
design
flat
fossil
geology
glossy
gray
grey
hard
heavy
illustration
industrial
industry
ingot
iron
isometric
lump
material
metal
metallic
metallurgy
miner
nugget
object
one
ore
palladium
piece
plate
platinum
polished
production
resource
rock
shape
sheet metal
shine
shiny
silver
silver ingot
stainless
steel