Epic Floor Design, although I'm not sure what the idea is. if laid with clear or glass tiles to see the design would be different, but to put black tiles over doesn't make any sense. I wonder if you get a magnifying glass to view the floor.
Tim Carney started creating artistic live edge table tops similar to this one, 18 years ago before they became trendy. :-) He cuts the slab lengthwise, then turns the live edges to the center and leaves a gap Advanced Joinery