A lot of gemstones and crystals have a ton of correspondences and powers but I will just add a few of them and their powers as I used them so here they are:Clear Quartz Crystal
It cleanses aura, plus it magnifies the energies you direct toward it, I used it as a tip for my wand.
Red Jasper
Red Jasper is great if you need confidence, I usually kept this stone in my pocket whenever I needed to be confident and kept rubbing it whenever I wanted extra boost of confidence.
Citrine
Citrine is a crystal that whenever I look at it, it gives me so much joy, its like it trapped the sun and all the happy memories in it, but anyway maybe its just me, this crystal is used for inspiration, if you are a writer/songwriter/musician just rub it or have it on sight while you write your book/lyrics/music and for sure it will give you the inspiration you need.
Aventurine
Aventurine is said to be used for money spells, you know because of its green color, but I would also use it as a protective crystal as well.
Black Tourmaline
Black Tourmaline is great for protection against Psychic Vampires, plus no spellwork can get to you if you have or wear a stone like this, so if you believe someone might cast a spell against you, just wear this stone, his/her spell will never affect you.
Pink Tourmaline
Pink Tourmaline causes love vibrations, so you can use it whenever you need to earn someones loves or make others like you.
Lapis Lazuli
I never fully understood this stone, but I call it the "Universe stone" because it reminds me universe in some way, it helps you connect with your higher self and cause prophetic dreams/visions (of course the stone by itself won't help, if you aren't meditating on being a medium or something)
Turquoise
Turquoise is a protective stone, it protects from accidents (in old times they were using it so they won't fall off horses) plus whenever you are sick its been said that this stone loses its color and gives healing powers to heal you, if you are well and the stone never return to its former color then you need to bury it and leave it there.
Leopard Jasper
OK don't laugh with me, but this stone reminds me of Africa, maybe its the name or maybe its the colors what can I say, anyway,the only thing I know for this stone is that whenever you have it with you, it will bring you what you need, NOT desire, need.
Moss Agate
Moss Agate has the power to make you move on from a matter, if you are angry at someone and not forgetting what they 've done to you, then use this stone and let it heal you and make you move on.
Sunstone
This stone is good for curing depression, just hold it or wear it, and let it heal you! its a beautiful stone too! sometimes whenever I feel depressed I take on of these and look at it, my minds is filling up with happy moments (just like citrine).
Rose Quartz
Rose Quartz is a pink stone that if it have a mouth, it would say to you "Love yourself", thats its ability, it helps you love yourself, also assists on diets, its more of a femminine stone, but it worked great for me too, and I'm a guy!
So thats the stones I wanted to tell you about, there are millions of others, and also millions of uses for the ones above, I just wrote my own experiences with them.