Clay (White, Green, Pink, Black)
Some sources include the kaolinite-serpentine group due to structural similaritiesClay minerals are hydrous aluminium phyllosilicates, sometimes with variable amounts of iron, magnesium, alkali metals, alkaline earths, and other cations found on or near some planetary surfaces. Clay minerals form in the presence of water and are important to life, and many theories of abiogenesis involve them. They are important constituents of soils, and have been useful to humans since ancient times in agriculture and manufacturing.
Clays form flat hexagonal sheets similar to the micas. Clay minerals are common weathering products (including weathering of feldspar) and low-temperature hydrothermal alteration products. Clay minerals are very common in soils, in fine-grained sedimentary rocks such as shale, mudstone, and siltstone and in fine-grained metamorphic slate and phyllite.
Clay minerals can be classified as 1:1 or 2:1, this originates because they are fundamentally built of tetrahedral silicate sheets and octahedral hydroxide sheets.
A 1:1 clay would consist of one tetrahedral sheet and one octahedral sheet, and examples would be kaolinite and serpentine. A 2:1 clay consists of an octahedral sheet sandwiched between two tetrahedral sheets, and examples are talc, vermiculite and montmorillonite.
Depending on the academic source, there are three or four main groups of clays: kaolinite, montmorillonite-smectite, illite, and chlorite. Chlorites are not always considered to be a clay, sometimes being classified as a separate group within the phyllosilicates. There are approximately 30 different types of "pure" clays in these categories, but most "natural" clay deposits are mixtures of these different types, along with other weathered minerals.
- Kaolin group which includes the minerals kaolinite, dickite, halloysite, and nacrite.
- Some sources include the kaolinite-serpentine group due to structural similarities.
- Smectite group which includes dioctahedral smectites such as montmorillonite, nontronite and beidellite and trioctahedral smectites for example saponite.
- Illite group which includes the clay-micas. Illite is the only common mineral.
- Chlorite group includes a wide variety of similar minerals with considerable chemical variation.
- Other 2:1 clay types exist such as sepiolite or attapulgite, clays with long water channels internal to their structure.
Depending on the soil's content in which it is found, clay can appear in various colours from white to dull grey or brown to deep orange-red, green and even black.
Fren Green Clay
Illite is a group of closely related non-expanding clay minerals. Illite is a secondary mineral precipitate, and an example of a phyllosilicate, or layered alumino-silicate.
Find French Green Clay in the following BVO Products.
French Pink Clay
French pink clay, also known as French rose clay is an Illite/Kaolin clay mined from ancient deposits in the South of France. Its unique composition includes Kaolinite, Iron, Illite, Montmorillonite and Calcite.
French Pink Illite is not a clay naturally mined as such - it is a mix of two French clays - White Kaolin and Red Illite and is mainly used in the beauty and cosmetics industry thanks to its soft, soothing, tonifying action on the skin. It is suitable for mostly all skin types, but especially for mature skin, prone to wrinkle formation and flushing.
Find French Pink Clay in the following BVO Products.
Kaolinite is a clay mineral, part of the group of industrial minerals. Rocks that are rich in kaolinite are known as kaolin or china clay. Kaolinite is a soft, earthy, usually white, mineral, produced by the chemical weathering of aluminium silicate minerals like feldspar. In many parts of the world it is colored pink-orange-red by iron oxide, giving it a distinct rust hue. Lighter concentrations yield white, yellow, or light orange colors. Commercial grades of kaolin are supplied and transported as dry powder, semi-dry noodle or as liquid slurry.
Kaolinite is one of the most common minerals; it is mined, as kaolin, in Malaysia, Pakistan, Vietnam, Brazil, Bulgaria,Bangladesh, France, the United Kingdom, Iran, Germany, India, Australia, Korea, the People's Republic of China, the Czech Republic, Spain, South Africa, and the United States.
Kaolinite clay occurs in abundance in soils that have formed from the chemical weathering of rocks in hot, moist climates—for example in tropical rainforest areas.
The main use of the mineral kaolinite (about 50% of the time) is the production of paper; its use ensures the gloss on some grades of coated paper. Kaolin is used or was used in ceramics as the component of porcelain, in cosmetics, in pain to extend titanium dioxide, for facial masks or soaps and any other applications.
Find Kaolin Clay in the following BVO Products.
Bentonite Clay is an absorbent aluminium phyllosilicate clay consisting mostly of montmorillonite. Montmorillonite is a very soft phyllosilicate group of minerals that form when they precipitate from water solution as microscopic crystals, known as clay. It is named after Montmorillon in France. Montmorillonite, a member of the smectite group, is a 2:1 clay, meaning that it has two tetrahedral sheets of silica sandwiching a central octahedral sheet of alumina.
The different types of bentonite are each named after the respective dominant element, such as potassium (K), sodium (Na), calcium (Ca), and aluminium (Al).
Montmorillonite is effective as an adsorptive of heavy metals. For external use, montmorillonite has been used to treat contact dermatitis.
For educational purposes only. This information has not been evaluated by the Food and Drug Administration. This information is not intended to diagnose, treat, cure, or prevent any disease.