In general for most people Amethyst will work very well on the Solar Plexus to help treat the digestive system.
If you find that you’re not one of those people Amethyst works well for, I do
recommend Citrine. Citrine, a lot of people don’t realize, is
actually just Amethyst that’s been either heated by man or heated within the earth. So the man-heated Citrine is normally that deeper amber brown color
and natural Citrine is a lot lighter yellow – almost close to a Smoky Quartz
color. And that can be successfully used to help treat the digestive system.
And I often recommend Citrine or Amber for anxiety. They both help sort of
instill a sense of self-confidence, will power, inner strength. So these can work
very well. Another stone for anxiety that can just be sort of carried on the person, it doesn’t necessarily have to be placed over the Solar Plexus, is Aquamarine. And I’ve had very good success treating a large number of people for anxiety with Aquamarine.