Gemworld as envisioned by Charles Vess
I had never heard of Amethyst, Princess of Gemworld until the scans were posted here. But upon going back through some old Neil Gaiman stuff, I realized that Gemworld gets a mention in the original Books of Magic miniseries (in issue #3, with art by Charles Vess).
Minor, I know, but I love seeing Vess' take on Gemworld.
They even drop in Zerox (this one, um, may not be Vess. In fact, I think it's Paul Johnson. I don't have the trade in front of me D:). Someday, Gemworld will exist again!