Chakra keyring - only 1 for the price
Chakras are 7 energy centres within the body that have to be balanced to maintain your health and mental balance. If these are disrupted it is believed that you become ill. Each energy centre needs selected coloured gemstones for each. 
Options are:
The Crown chakra - sahasrara- clear quartz
The third eye chakra - ajna- sodalite and lapis lazuli
The throat chakra - vishuddha - aquamarine
The heart chakra -Anahata - green aventurine
The solar plexus - manipura - lemon quartz and golden rutile quartz
The sacral chakra - svadhishthana - carnelian and red agate
The root/base chakra - muladhara - black agate and tourmaline