amethyst
background
beautiful
bright
calcium
clear
closeup
cluster
collection
colorful
crystal
crystalline
crystals
cubic
detail
fluoride
fluorite
fluorspar
gem
gemstone
geology
glass
green
healing
isolated
jewelry
macro
matrix
mineral
mineralogy
natural
nature
ore
precious
purple
quartz
rock
rough
sample
science
semiprecious
shiny
specimen
sphalerite
stone
transparent
uncut
white