This heart shaped stone lay among the white, green and grey stones on the isle of Iona. Iona has a long and illustrious history and is well known as being ‘The Cradle of Christianity’ in Scotland. Known as Columba ’s tears or mermaid’s tears the greenstones are a prized reward for whiling away a day or two along the island’s shores. Equally beautiful is Iona’s white marble and the quartz intruded sedimentary stone found on the south west side of the island.