From prehistoric times. Millions of years ago, the Earth's plant mass was enormous. The earth contained numerous minerals and trace elements that were absorbed by the root system of plants. These plants thus provided a highly nutritious food supply for everything that lived on Earth. With the Ice Age, not only did the dinosaurs disappear, but huge amounts of plant material were also buried under ice and sediments. Through various geological processes, most of this material has been pushed deep into the ground and fossilized under high pressure and temperature. Today, we recognize this as coal, petroleum, and even diamonds. However, in a few parts of the world, this material has fallen just a few meters underground and has been preserved and not fossilized (petrified) for millions of years. This material is very rich in minerals of plant origin.
We have our own mine in the southeast of the US where we excavate and purify this raw, pristine 32 million old material. Pure and 100% natural.