Also, to add to the OP question, how can you feel if a certain "stone" is good; since everyone is different?
Thanks in advance for any useful answer.
Kyanite is another favorite of mine, just for feeling good. Bloodstone is good for protection from dark entities and energy vamps. Black Obsidian can be very helpful in certain spells.
And you can never have enough white quartz and rose quartz.
Those are just the ones I can think of off the top of my head that I personally use the most. But all crystals pretty much rock.