London Blue Topaz -- what you get when you expose an ordinary clear topaz to an electron stream at a nuclear facility. It turns into a really butt ugly color, but when you heat it up a tad, the ugly goes away and you're left with the color of the ocean off the Pacific Coast.

Just the most awesome blue you ever saw, with just a hint of green to it. I'm just totally in love with them.

This ring sits nicely on the finger, pretty filigree, center stone displayed well. This is a really nice, pretty ring.