aggregate
amethyst
blue
calcium
cluster
complex
crystal
crystal healing
crystalline
cube
cubic
erongo
fluor spar
fluorescent
fluoride
fluorine
fluorite
fluorite quartz
gem
gemmy
gemstone
geology
glass
glassy
healing
hydrothermal
inclusion
industry
matrix
mineral
mineralogy
minerals
natural therapy
octahedral
ore
pegmatite
precious
quartz
rose crystal
rose quartz
semiprecious
specimen
stone
transparent
uncut