aggregate
amethyst
calcium
cluster
collect
collection
colorful
complex
crystal
crystalhealing
crystalline
cube
cubic
erongo
fluorescent
fluoride
fluoritequartz
gem
gemstone
geological
geology
green
healing
hemimorphite
mine
mineral
mineralogy
natural
naturaltherapy
nature
octahedral
ore
pegmatite
pure
purple
quartz
raw
rock
rosecrystal
rosequartz
rough
sample
science
silica
specimen
stone
transparent
uncut
violet