All about clays - Benefits of natural material from the Earth

Gaias Lab

Posted on March 15 2018


Clays are perfectly natural, mineral-origin, and can be used as cosmetic actives with multiple applications. Cosmetic quality clays are sun-dried, stored in conditions ensuring their good ventilation, and then very finely crushed to obtain the adequate quality for use. 

Man has used clays for thousands of years thanks to their availability and their remarkable properties, which make them ideal for many applications. They have many famous traditional uses: for bricks, roof tiles, pottery, dishes and artwork, especially white clay, or kaolin (meaning ‘earth from the top of the hills’ in Chinese), to make the finest china.

Clays have proven therapeutic benefits for the body and skin. Bathing in mud is quite common among elephants to protect their skin from parasites or to heal wounds. Man has used clays in traditional medicine for plasters, body wraps, etc.

The special characteristics of clay make them suitable for cosmetic applications. They have significant absorbing properties, adsorbing properties, etc. that make them useful to improve skin and remove blackheads.  They are perfect to absorb sebum, to purify and remineralise the skin.

Mineral content of clays contains oxides of silicon, aluminum, potassium, iron, magnesium and calcium. 

pH of different clays:

Clays are high pH by default and it would make the skin red just after use. The redness should disappear within 15 minutes. It is a temporary redness and is caused by the clay's pH which is quite basic on the pH scale.

Lower the pH of the clay, the less irritating or redness it will cause.

Clay  pH value
Bentonite  8 - 9.5
French Green 7.5
Fuller's Earth 7.5
Rhassoul 7.5
Dead Sea Mud 7.0
Kaolin 6.0
Moor Mud 4.5 - 5.5



We have used Kaolin clay with a skin friendly pH of 6 in our mask formulation. 


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