what is a colloidal substance?give e.g?

Colloidal substance:

It is a heterogeneous mixture made up of two phases namely, dispersed phase and dispersion medium. 

Dispersed phase: The substance distributed as particles is called dispersed phase.

Dispersion medium: The continuous phase in which the colloidal particles are dispersed is called dispersion medium.

Dispersed Medium	Dispersed Phase	Types Of Colloids	Examples of  Colloids
Solid	Solid	Solid Sol	Gemstones, Pearls, Some Coloured Glass
Solid	Liquid	Gels	Cheese ,Butter, Jellies, Jam, Shoe Polish
Solid	Gas	Solid Sol	Pumice Stone, Foam Rubber