To restore shine on natural stone tiles, you should follow the following steps:-
Clean the tile thoroughly: Use a stone-safe cleaner to remove any dirt, grime, or stains from the tile. Rinse thoroughly and allow to dry completely.
Polish the tile: Use a stone-safe polishing powder and a soft cloth or buffer to polish the tile. Apply the powder to the tile and use a circular motion to buff the surface until it shines. Be sure to work in small areas and not to leave the polishing powder on the tile for too long.
Seal the tile: Apply a stone sealer to the tile to protect it from stains and moisture. Follow the manufacturer's instructions for application, as different types of sealers may have different application methods.
Maintain the shine: Regularly clean and maintain the tile to keep it looking shiny. Avoid using harsh or abrasive cleaners, and clean up spills and stains immediately.