Check out this fab Wire Healing Crystal and Gemstone necklace.  It comes with interchangeable crystals and gemstones - make your own necklace! 
Cord length: Approx 72cm
 
Crystals - Gemstones included:-
Amethyst - a peaceful balancing stone
Rose Quartz - a stone of unconditional love
Cirtine - a success and prosperity stone
Hematite - a stability stone
Clear Crystal Quartz - a power stone to enhance positive energy
Howlite - a calming stone
Green Aventurine - a lucky stone