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The invention relates to a coated diamond comprising a dia mond Substrate; a primary carbided layer of a carbide forming element; a secondary layer of a high melting point metal selected from W. Mo, Cr, Ni, Ta, Au, Pt, Pd or any combina tion or alloy thereof, the secondary layer being Substantially free of carbide forming element from the primary layer; and an overcoat of Ag, Ni, Cu, Au, Pd, Pt, Rh, Os, Tr. Re, any combination or alloy thereof, the metal of the secondary layer being different to the metal of the overcoat. The invention further relates to methods for producing such coated dia monds and abrasive-containing tools including Such coated diamonds.