It naturally comprises valuable elements, including montmorillonite, several (up to 9) important mineral oxides, magnesium, calcium, potassium, dolomite, silica, manganese, phosporous, silicon, copper, and selenium.
The green colour, which is due to the iron oxide content and decomposed plant matter, can indicate a good or poor quality clay.
Green Clay Powder
Sourced from France
1 level teaspoon = 3g