Thousands of years ago the Earth had a rock mantle. During the glaciations the glaciers moved and crushed the rocks slowly and inexorably. The soil supported the life of the plants, since it had the necessary minerals for their growth.
For thousands of years, essential micronutrients were continuously incorporated by plants, often to the point of depletion. Today, farmers and gardeners try to add nutrients to the soil through fertilizers, compost, or other ways. However, these materials rarely contain all the micronutrients eroded or absorbed by plants.
The use of rock dust is not new. Agricultural research with rock dust and chemically unprocessed minerals, based on the concept of “stone bread” was initiated in the 19th century by Missoux (1853-1854) and Hensel (1890, 1894), among others.