(A bigger version of the picture I'm currently using as my userpic)
Here are some pictures of a necklace I made (and have listed on my Etsy) featuring beads made of cut and polished agate.
Those beads caught my eye because, while at first they just seem to have different shades of purple in them, if you look closer you can find swirls of brown, yellow and green too.(When I bought them from my local bead store, the receipt actually said "crazy agates." I thought that was kind of funny --- do they also have Irascible Quartz*, or Melancholy Marcasite? I tried Googling the phrase, to see if that made anything clearer, and only found references to "crazy lace agate," which these might or might not be. The crazy-lace agates I could see on the internet tended to have, er, lacier patterns than these do).
... And here's a picture of me wearing the necklace with an outfit that actually complements it, as opposed to just being a dark background:
(The light in that one sucks for seeing the color of the stones).*As soon as I had that thought, I decided I *wanted* some Irascible Quartz. It is very beautiful in my imagination: little clusters of crystalline spears, colored a deep, lurid red like some unholy cross between blood and lava, with black streaks and fine metallic filaments shooting around the inside. It might even glow.