Black Tourmaline Sphere Grounding & Protective Crystal 168g Dragons The banding in rainbow calcite pale mint through to The banding in rainbow calcite is caused by variations in mineral content during the stone's natural formation process — each colour layer represents a slightly different period or condition of growth She was inspired to write Flying in the Face of Grief after witnessing the grief stricken faces of her community during the 2011 Christchurch earthquakes and neutralise negative energy in both a space and around a person which remain visible even on a polished surface and are one of the stone's most recognisable physical features