Calcium Montmorillonite is a clay mineral compound that is a member of the Smectite family.  It typically  is formed in micro sized thin sheet shaped platelets.   It is a 2:1 clay, meaning  that it has 2 tetrahedral sheets sandwiching a central octahedral sheet, with trace mineral anions bound to the surface areas.


Chemically it is hydrated calcium aluminum silicate hydroxide with many other elements including potassium, iron, magnesium, phosphorus, manganese and over 50 more mineral elements. It is part of the earth’s crust along with volcanic ash and other weathered elements formed millions/billions of years ago


ION-MIN Specifications



Color can be beige neutral, cream, brown, gray

                                                                                     Luster is dull.

Transparency crystals are translucent and masses are opaque.

 Octahedral Crystal Lattice Structure for Maximum Surface Area

Cleavage is perfect in one direction, basal; not seen in massive specimens.

 Fracture is uneven to lamellar.

Hardness is 1- 2

Specific Gravity is variable from  2.3-3 in compressed powder form

Weight is approximately 8 lbs per gallon – pH is 8.3


ION-MIN®   Description

California Earth Minerals sells premium montmorillonite clay products under the brand,  ION-MIN® . Only the finest montmorillonite clays are used in the sub brands of Terramin, Terrasilk, Terrapak, Terrabathe, Terraglacial, Terrapond, Nutramin and Earthfood are all high grade form of Montmorillonite clay in an active, open ionic state. This material is processed to a free flowing powder containing low swelling properties, high thermo stability, high plasticity and tensile strength that provides excellent health and healing benefits.

ION-MIN is sold under various consumer brands through dealers and distributors. Additiionally,
our powders in their final, consumer-ready forms contain no additives, colors, or fragrances. Zero pathogens, toxins, or allergens. It is not altered in any way. They are all 100% natural.

Technical Data

The CAS registry number for Montmorillonite is 1318-93-0.

The EINECS number for Montmorillonite is 215-288-5

For ingestion, Montmorillonite NOT Bentonite is what you want for maximum efficacy.  It is the best for this application because of its molecular structure.  Ideally suited for minerals and mandatory because of its particle size and surface area.

Under discussion are two distinct types of Smectite clays. Montmorillonite (Mt) and Bentonite (Bt). Bt is best used for commercial/industrial applications, although there are some derivatives repurposed for consumer use for health and cosmetics. Bt is hyper-swelling clay that should not be ingested. It swells, clumps and is a good material for pond/lake sealant, oil well drilling mud, cat litter, grease, dynamite, crayons, etc.. Certain, but not all, Montmorillonites (Mt) are good for skin applications and are an excellent edible dietary health supplement for people and animals.  Great benefits for plant and soil re-mineralization to enhance nutrient bioavailability.  

 ION-MIN® brands of clay products  have a number of unique and beneficial properties.  The sub brands of ION-MIN, like Terramin, Terraglacial, etc. are all premium montmorillonite clays.  California Earth Minerals has established laboratory testing protocol that sets the standards for any clay processed and sold.

1. The deposits of Mt are rarer than deposits of Bt. Mt have a smaller particle size than Bt and Mt have a survivable zeta potential, minimum of 800 sq. ft./gr of surface area, a consistently formed and bonded lattice structure , are highly mineralized and all elements are available at safe to consume levels as measured in laboratory testing.  In all ION-MIN branded products, energy is present and detectable.

2.  The clay compound must act as an efficient delivery vehicle for mineral nutrients to the skin and body when applied topically and ingested in tablet/caplet or powder forms.

3.  Hydrated to a paste, it can draw oils and toxins from the skin and hair.  

4.  It is a powerful adsorbent that can attract heavy metals and toxins onto the clay particle,  neutralizing harmful particulates, pathogens, and toxins.    

5. Certain superior deposits contain a portfolio of macro, micro and trace minerals such as  calcium, magnesium, iron, potassium, silica, copper, chromium, and zinc, etc., all in bio-available form.



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