Crystal Earrings: Help to balance the throat, neck and head energies
Pendants: Depending on the length of the chain will determine the chakra that is going to be stimulated or balanced.
Bracelets: Worn on the left side receives energy. The right side is for grounding i.e. Smokey Quartz or Jasper.
Rings: They will stimulate the different meridians. 
Pockets/ Pouches: Keep stones pinned inside clothing.

Stones related to the lower chakra's are most effective as bracelets, rings or belts. Stones related to the fourth and fifth chakra's are best worn as necklaces and pendants while stones connected to the sixth and seventh chakra's are best worn as earrings.