aluminum
アルミニウム
bar
brick
bronze
business
copper
currency
detail
gray
group
heap
icon
illustration
industrial
industry
ingot
ingots
iron
isolated
material
materials
metal
metallic
metallurgy
metalware
metalwork
mine
mineral
ore
pipe
precious
product
shine
shiny
silver
stainless
steel
stock
stone
trade
treasure
tube
value
wealth