And @Ma'in Hot Springs hotel staying or a daily pass are 10 times better options than the public area, where you can't even touch the water, definitely worth it!
Try @Spago Restaurant they have as appetizers and salads for a quick lunch, and also it's nice to go there with your friends for a decent dinner. I like that I can actually eat and talk to my friends without raising the voice, the music is very balanced - and their risotto is the best in Amman.
Answering to my own question myself: check @Afghani, plenty of natural stones in silver, plain yet good stuff. They bring stones from India mainly, so check the quality very carefully.