the.com/gemology
the art of telling a billion-year-old miracle from a very confident piece of glass
4 c'sCut, color, clarity, carat decide a stone's worth
carat originNamed after carob seeds, once used as weights
lab vs mineSynthetic diamonds are chemically identical, far cheaper
glow testMany gems fluoresce eerily under ultraviolet light
hardest toolOnly diamond reliably scratches diamond