If you can, visit a place where you can hold the stone, that way you can get a definite feel for its energy. What works for you and your chakras, might not have the same effect on someone else! 
The stone used are: 
1) Bloodstone 
2) Carnelian
3) Amber
4) Green Agate 
5) Aquamarine 
6) Lapis 
7) Amethyst