Terrazzo.

See if your local tile shop sells Happy Floors. They have a large selection of larger tiles.

Just a few of the designs they have!

Good luck

Get yourself to a great tile shop in your area and check out the possibilities! There are plenty.

Daltile's new Sand and Stone line is a great interpretation of terrazzo, and comes in a 24x48 size.

What does large mean to you as my local supplier has 48 x 48 tile slabs?

Not enough info to understand what you want. Large format can be many things . The big issue with huge format tile is the tile setter and the sub floor . I use poecealis tile ll the time no patteren but usually 12 x24 to make it simple for install and any decent tile setter can do it.