Although this has been covered before here, recently, let's give it
First, amethyst is the purplish variety of quartz. If the quartz is
green it is not amethyst. Ever, period.
Some amethyst, when irradiated and subsequently heat treated, turns
a greenish-yellow, with slight brown or gray overtones. But it's not
amethyst anymore. It is referred to by wholesalers and cutters as
"greened quartz". The material is inexpensive and readily available.
Some naturally occurring green quartz is occasionally found, but it
is quite rare and what little is found is snapped up by collectors
The Crystallographic Research Institute of the Russian Academy of
Natural Sciences grows hydrothermal quartz in a number of colors.
They produce amethyst and citrine in a few different shades,
ametrine, three shades of blue quartz and two shades of green
quartz. The green often has a slight bluish-grayish component, but
it is attractive. It is inexpensive in the rough and is cut in
quantity in China and elsewhere as faceted stones, cabochons and
briolettes. Once sold, the Chinese do not care what you call it.
I occasionally facet all these materials when my jewelry store owner
customers request it. I enjoy creating unusual shapes and cuts with
it and it sells very well for my clients and with a significant
markup. No, it is not cheap after I have applied my labor to it, but
it still earns 3-4 x markup at retail when the cut is unusual and
well-executed. Again, there is no such thing as green amethyst.
Amethyst is purple, reddish-purple, bluish-purple, purplish-pink.
But not green. Ever. Please.
And if someone calls it green amethyst, please correct (educate)
them. There is already enough confusion in the jewelry world, we
should be carrying a light to bring clasrity and understanding, not
bringing darkness to obfuscate and confuse. Thanks.