biotite
birthstone
borosilicate
crystal
crystalline
crystallisation
crystallization
crystallography
diagenesis
dioxide
gem
gemology
gemstone
geological
geology
geomorphology
green
igneous
inclusion
inorganic
jewel
lapidary
macro
macrocrystalline
matrix
metamorphic
mineral
mineralized
mineralogy
pegmatite
petrology
precious
rare
raw
rock
rough
semiprecious
silicate
silicon
silicon dioxide
sio2
starstone
tourmaline
translucent
transparent
turmalin
turmaline
unpolished
verdelite
vitreous