Slightly unethical tip: you can get free 4x4 in samples of vinyl tile at home improvement stores. They come in marble and a variety of wood patterns. : r/DnDIY
Tiles Talk: Everything You Need to Know about Tile Samples - Perini
Free Tile Samples by Mosaics.co – Mosaics & Company LLC
Ordering Samples | Free Tile Samples | Tiles & Natural Stone | Ca'Pietra | Ca' Pietra