artifact
background
chryzopal
closeup
colorful
colors
discovery
ethiopia
ethiopian
gem
gemstone
geology
interference
iridescent
isolated
lower
mine
mineral
mineral resources
mineralogy
natural
natural resource
nobody
opal
opalescence
precious
quartz
raw
rock
rough
saw cut
seam
semiprecious
specimen
stone
studio
uncut
unpolished
unprocessed
untreated
up
valuable
wello
white
white background