This first series ended decently, except for her boyfriend being unwilling to wait for her to grow up. But she was blinded in Crisis on Infinite Earths, I believe, and then had to merge with the Gemworld to keep it together or something. She pretty much lost her earth childhood.
And I think Topaz and Turquoise gave birth to Mordru maybe. Gemworld itself becomes Xerox, the sorcerer's world...basically, the light happiness goes away. Better off not reading past this first series.
I personally would like to see Sorcerer's World explored with an eye toward this past magic society based on gemstones. And if someone made an ongoing, I'd prefer it based on this first series, with Amy going to Gemworld for adventures.