abstract
alloy
aluminium
aluminum
angle
backdrop
background
blank
block
brushed
cube
dark
design
dirty
durable
gray
grey
grind
grunge
hard
heavy
industrial
industry
iron
line
material
metal
metallic
modern
old
pattern
plate
rhombus
rough
rust
scratch
sheet
shine
silver
sleek
smooth
space
stainless
steel
strong
surface
texture
tough
wall
wallpaper