backlit
black
cave
coal
construction
danger
dark
digger
discovery
drilling
employment
engineering
exploration
flashlight
fossil
geology
gold
hard
hat
head
headlight
industry
iron
job
laborer
light
man
manual
miner
occupation
one
ore
person
platinum
portrait
production
profession
professional
red
rescue
risk
rock
safety
silhouette
staff
tunnel
underground
worker