Thanks for all the info. I do really like the jewels and if it's safe to get a pair from the store I think I'd like to do that. When I went last she pointed out one male who was trying to spawn while we were standing there, but I wasn't ready to get fish yet. But, they said if I called in advance they would be able to observe them and find a pair of them.
Would rainbows be a better bet, or are they both kind of the same?