Generally speaking, clays are fine grained minerals. There are many different types of clays and they vary depending on where they originated from. They are often used in beauty care products and touted to pull oils from the skin leaving your skin smooth, clean, toned and firm.
Bentonite Clay is great for oily skin. It has the ability to absorb oils and is also great for shaving, giving your razor a silky glide over the skin.
Brazilian Clay comes in a variety of natural colours depending on where it is found in the soil. You can find it in a natural, dark red, pink and yellow pigment. It is a gentle clay suitable for a wide variety of skin types.
French Green Clay, from France, is finely textured and is often used in masks because of its ability to absorb oils. It is a pale green colour and it is best suited for oily skin.
Kaolin Clay is a fine grained, soft white clay and suited for normal or dry skin. As you massage it into your skin, this exfoliating clay not only buffs away dead skin cells, it also promotes blood flow.
Green Zeolite Clay is a courser grain clay, so works well as an exfoliator. It has great absorption and is suitable for normal to oily skin.
Rhassoul Clay is a brown clay only found in a valley in the Atlas mountains of Morocco. ... Sometimes called Moroccan red clay or ghassoul clay, rhassoul clay is a type of stevensite, a magnesium-rich clay that contains other minerals. Rhassoul clay is rich in magnesium and potassium. Anecdotally, many skincare gurus swear that magnesium can be absorbed through your skin barrier to fight acne, cleanse impurities, and improve skin elasticity.
You can use your clay soap daily or weekly depending on your skin type and the type of cleanse you want. Find out what type is best for you by buying a few different types of bars and experimenting.
Adapted in part from Soap Queen
Adapted in part from Health Line