This lovely little Celtic symbol, the spiral triskele has many different meanings. Some say it represents the three elements of earth, water and air. Others believe it represents the three aspects of the Triple Goddess, maiden, mother and crone or the Holy Trinity, Father, Son & Holy Spirit. Yet others say it represents the life cycle of birth, life and death. 
The stones inside are peridot, the stone of joy, moss agate, a stone of prosperity & abundance and apatite which expands knowledge and truth.