agate
apophyllite
chalcedony
conglomerates
copper
crystal
crystals
desmin
gem
gemstone
geological
geology
jasper
jewel
jewelery
jewelry
manufacturing
mine
mineral
mineralogy
natural
nature
ore
precious
quartz
rock
science
sectility
semiprecious
silicate
smokey
specimen
stalactite
stilbite
stone
uncut
unpolished
valuable