The eeriness of the Champagne pools is due to the steam vapour which sits over the area because of its high temperature of 74 degrees centigrade. The bubbles are due to CO2 which gives its name to the 700 year young pool, as this is the same process making the bubbles in champagne.. The heat is palpable as you carefully traverse this 65 metre diameter pool. The fragile sinter crust would be no protection if you were to fall into the boiling 62 metre deep water. The orange colour is from the presence of antimony. Minerals present are gold, silver, mercury, sulphur, arsenic, thallium, and antimony deposited in the sinter ledge at the edge.