Patent ID: 7968202

Claim:
A sealed natural cut stone comprising: a natural cut stone having pores therein; and a matrix material filled in at least pores of the natural cut stone which are accessible from a surface of the natural cut stone, wherein the matrix material has a network formed at least partly by silicon-oxygen bonds and comprises oxide particles of at least one element selected from the group consisting of Ti, Si, Zr, Al, Y, Sn and Ce, the silicon atoms present in the network have organic radicals bonded to the silicon atoms at least partly via carbon atoms, the oxide particles comprise, on surfaces thereof, the organic radicals bonded to silicon atoms and represented by a formula X 1+2n C n —, where n=1 to 20 and X=hydrogen or fluorine, and X according to the formula denotes exclusively fluorine, exclusively hydrogen or both fluorine and hydrogen.