agate opal
cacholong
close up
collage
collection
crystal
crystalline
cut out
cutout
decorative
gem
gemmological
gemology
gemstone
geological
geology
gray
isolated
jewelry
kalmuck agate
kascholong
little
macro
mineral
mineralogy
mother of pearl opal
natural
opal
ornamental
pearl opal
pebble
piece
polished
raw
rock
rough
sample
semiprecious
set
small
specimen
stone
surface
tumbled
tumbling
various
white
white background