Gaia, the Greek Earth goddess, akin to Terra Mater in Roman mythology, Pachamama in Andean culture, Prithvi in Hinduism, and Kokyangwuti, the Spider Grandmother in Hopi tradition. They all symbolize the Earth's nurturing essence and her role in fostering life and we cant help but see our beloved Earth in these beautiful Opals Emily hand picks each opal and sets them in solid yellow gold with a gold hammered band. These stacking rings are perfect alone or incorporated into your beloved stack. Each setting will fit comfortably on top of a 1.5mm thick band. WE RECOMMEND SIZING UP ABOUT 1/4-1/2 FROM YOUR TYPICAL RING SIZE FOR STACKING 3 OR MORE BANDS.