https://http://www.vedicprediction.com/gemstones.htmlThat's only one link with a very vague description on various Precious and Semi-precious Gem stones. There's a whole theory behind various Quartz crystals and vastly varying effects that lead to the energy of the crystals helping out the person who wears the stones/ is attuned with them.
I'm no expert, but I know a bit, mostly around the theory of the crystals and how to use them rather than the specific effects, but a little research could change that.
That's the only mildly useful link I could find on short notice, however >-> Sorry.
