Polished concrete is concrete that is ground down to expose the stone fora salt & pepper finish or flat finish. It is then highly polished for a glassy mirror effect. Polished concrete is more suited to indoors environments.
Honed concrete is the same as polished concrete except that it is sprayed with a penetrating sealer which stops it from staining, honed concrete also offers a non-slip matte finish vs a polished slippery finish with polished concrete. Honed concrete is more suited to outdoor environments.
Once sealed or polished it will highlight the concrete & stone colour.