There were trained artisans
Aztec Indians found art and literature beautiful. They had artisans that would work with feathers to make beautiful fans and costumes. There were also artisans that made shields and mosaic hangings. There were also writers that wrote beautiful poetry.
A picture made with with tiles and stone is a mosaic.
The cave canem mosaic was made of marble tiles (tesserae).
The Cave Canem (beware of the dog) mosaic was made of marble tesserae (pieces).
made from many cultures
Mosaic tables are generally tables with assembled small pieces of colored glass, stone or other materials. Mosaic tables can be made using custom design or pre-made stones.
Aztec stonemasons made tools made of rock
the alexandria mosaic
mosaic
I read that it was presented to the U. N. on its 40th anniversary by Nancy Reagan. The mosaic was made in Italy by mosaic experts.
If you are asking when mosaic art was developed, the oldest mosaics date back to 3000 to 4000 BC.