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 Raw Gold Crude Vermiculite Or Silver Vermiculite

Vermiculite is a kind of natural, non-toxic, inorganic silicate mineral, whose raw ore looks like mica. Vermiculite is formed by the hydrothermal alteration or weathering of minerals, usually biotite and phlogopite. When heated,it expands like leech. Vermiculite are divided into raw vermiculite and expanded vermiculite by stages, and according to the color, it can be divided into golden vermiculite, silvery white vermiculite, milky white vermiculite.

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Product Description

Vermiculite flake is the name of vermiculite raw ore and the general name of unexpanded vermiculite. After the vermiculite is mined out, the impurities are removed, and the surface of vermiculite is flaky. Therefore, it called vermiculite flake, which is also called raw ore vermiculite, raw vermiculite, unexpanded vermiculite and non foamed vermiculite.

Raw vermiculite is a natural mineral, non-toxic, will expand at high temperature under the action of mineral. It is alternatively rare mineral, which belongs to the portland. The crystal structure is monoclinic, from the shape it looks like mica. Certain granite hydrated vermiculite is generated. The ability of ion exchange vermiculite, its soil nutrition has a great role.Vermiculite can be used as construction materials, adsorbents, fireproof insulation, mechanical lubricant, soil conditioner and so on, a wide range of uses.

Raw Vermiculite new7





 Expansion Rate

 0.3-1 mm 


 3% max 

 6-20 times

 1-2 mm


 3% max 

 7-20 times

 2-4 mm 


 3% max 

7-20 times

 4-8 mm


 3% max 

 7-20 times 

Types of Vermiculite

Golden raw vermiculite Silver raw vermiculite
0.3-1mm 0.3-1mm
1.5-2.5mm 1-2mm
2.5-6mm 2-4mm
3-8mm 4-8mm
Other specification: 20-40mesh, 60mesh, 80mesh, 100mesh, 325mesh etc.

Chemical Composition of Vermiculite

Golden Vermiculite element SiO2 Al2O3 Fe2O3 CaO MgO TiO2 K2O
content % 43.75 15.55 15.8 1.32 8.98 1.67 5.19

Processed Vermiculite

Vermiculite may be milled before or after exfoliation according to the range of particle sizes required. Such milled or ground material may be used for the production of sound-absorbing coatings; Condensation control paints; High performance gaskets and seals and for upgrading the fire resistance of organic foams and other polymer based system. Exfoliated vermiculite can be colored to suit its end use.


Our factories have achieved ISO Certificate, 23 technologies have obtained national patents.



Improve soil or correct soil deficiencies( lighten clay soils).
Vermiculite is used as a carrier and extender for fertilizer.
Expanded vermiculite is a good medium for the stimulation of roof growth.
Expanded vermiculite is a major element in hydroponics growing system.

Gaskets or seals; Fireproofing
Packing materials; Animal feedstuffs
Friction linings; Refractory products
Insulation in steelworks and foundries

Bitumen coated vermiculite plates
Construction coatings; Lightweight concretes
Loose fill insulation; Vermiculite plasters
Fireproof board



Animal hatching

Animal hatching

Plant seeding

Mix with soil


1-2mm, 0.3-1mm, 20-40 mesh.




20-40 mesh


1.0mt-1.2mt jumbo bag. Could be customized as required.

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