Hi, Most of our tiles are wall only; we do have two models (EMT_AL07-SIL-CB and EMT_ALWF11-SIL-CB) of aluminum tiles can be installed on floors in dry areas. These are silver in color so much lighter; not sure they would fit with the dark black colors on the fireplace surround unless you want a contrast. You could check those out or the look for ideas at your local tile or big box store. The link for the two Aluminum tiles mentioned above are

[EMT-AL07-SIL-CB link on Houzz[(https://www.houzz.com/products/118x118-long-brick-pattern-aluminum-mosaic-tile-single-sheet-prvw-vr~4742316?lid=511078)

[EMT-ALWF11-SIL-CB link on Houzz[(https://www.houzz.com/products/1025x118-long-random-bar-silver-aluminum-tile-10-single-sheet-silver-prvw-vr~4742462?lid=511223)