T J Clark?s Colloidal Mineral Formula is a liquid extract of mineral compounds sourced from the current T J Clark mine. This mine produces a material rich in minerals from a rainforest in Central Utah, USA. Between 60 and 127 million years ago this mineral rich rainforest became covered and preserved by sandstone and a layer of clay, resulting in an intensely rich preserved source of over 72 minerals. These minerals are found in a combination and balance as produced by nature. T J Clark naturally extracts these mineral compounds with water and without the use of acids or damaging heat.