A method for coating a stone type substrate, said substrate being based on a mixture of stone aggregates with calcareous materials and/or dolomitic limestones agglomerated by means of a first binder, said method comprising the formation of a layer over said substrate to increase its hardness, chemical resistance, wear and scratch resistance, said method being characterized in that it comprises the following steps: applying on said substrate a coating matrix incorporating at least one organic material that is selected from organosilanes, organophosphonates, polycarboxylic compounds, compounds based on triazine heterocycles and fillers including inorganic nanoparticles and/or microparticles; chemically binding said matrix to the substrate by means of conducting a self assembly process and/or by means of a binding process by covalent bonding, electrostatic bonding, van der Waals bonding or hydrogen bonds; and drying said matrix, wherein said organic material, which is at least one in number, and/or said nanoparticles and/or microparticles are functionalized with molecules with at least one of the following groups: Si-OH, SiOR (R= organic compound) or Si-Cl, aldehyde or ketone or COOH, NH 2, phosphates, phosphonates, sulfonates, sulfates, or the combination thereof; and wherein said nanoparticles and microparticles are selected from the group including: alumina, boron carbide, boron nitride, silicates, glass microspheres, silicon carbide, silica, quartz, copper oxide, micro- and nanofibers, core-shell particles, n-Na 2 SiO 3 or a combination thereof, to form a three-dimensional lattice, which is bound to the substrate by chemical bonds encapsulating different nanoparticles and/or microparticles. applying on said substrate a coating matrix incorporating at least one organic material that is selected from organosilanes, organophosphonates, polycarboxylic compounds, compounds based on triazine heterocycles and fillers including inorganic nanoparticles and/or microparticles; chemically binding said matrix to the substrate by means of conducting a self assembly process and/or by means of a binding process by covalent bonding, electrostatic bonding, van der Waals bonding or hydrogen bonds; and drying said matrix, wherein said organic material, which is at least one in number, and/or said nanoparticles and/or microparticles are functionalized with molecules with at least one of the following groups: Si-OH, SiOR (R= organic compound) or Si-Cl, aldehyde or ketone or COOH, NH 2, phosphates, phosphonates, sulfonates, sulfates, or the combination thereof; and wherein said nanoparticles and microparticles are selected from the group including: alumina, boron carbide, boron nitride, silicates, glass microspheres, silicon carbide, silica, quartz, copper oxide, micro- and nanofibers, core-shell particles, n-Na 2 SiO 3 or a combination thereof, to form a three-dimensional lattice, which is bound to the substrate by chemical bonds encapsulating different nanoparticles and/or microparticles. chemically binding said matrix to the substrate by means of conducting a self assembly process and/or by means of a binding process by covalent bonding, electrostatic bonding, van der Waals bonding or hydrogen bonds; and drying said matrix, wherein said organic material, which is at least one in number, and/or said nanoparticles and/or microparticles are functionalized with molecules with at least one of the following groups: Si-OH, SiOR (R= organic compound) or Si-Cl, aldehyde or ketone or COOH, NH 2, phosphates, phosphonates, sulfonates, sulfates, or the combination thereof; and wherein said nanoparticles and microparticles are selected from the group including: alumina, boron carbide, boron nitride, silicates, glass microspheres, silicon carbide, silica, quartz, copper oxide, micro- and nanofibers, core-shell particles, n-Na 2 SiO 3 or a combination thereof, to form a three-dimensional lattice, which is bound to the substrate by chemical bonds encapsulating different nanoparticles and/or microparticles.