We have now turned this moisturiser into a liquid foundation by adding a mineral powder foundation to the moisturiser above. The problem that w are having is that the water is separating after a while . Why would this be happening? The mineral powder ingredients are Serecite Mica, Titanium Dioxide, Zinc Oxide, Rice Powder, Magnesium Myristate, Kaolin Clay, Boron Nitride, Mica, Iron Oxides, May contain Ultramarine Blue