In this video I traveled with my friend ‪clawquest‬ to see if we could find valuable natural amethyst in a private mine!

Cutters sometimes fashion ametrines as mixed cuts or brilliant cuts and use internal reflections to mingle the amethyst and citrine colors. Ametrine is also popular in free-form or fantasy cuts. There ...

as well as new heating and irradiation experiments with the current natural amethyst-citrine quartz and with amethyst, are described. It is concluded that there are presently no known tests to ...