Clogau heart of wales sterling silver 9ct rose gold preseli bluestone locket pendant3stlpbl full of charm and majesty the heart of wales collection celebrates the fascinating history of the stone that it beholds preseli bluestones are the stones used in building stonehenge 5 000 years ago and are only found in the preseli hills in pembrokeshire west wales with the preseli bluestone possessing healing and magical powers this unique collection truly is a captivating piece of wales to wear