Snow White, Verde Tia Honed Windmill Waterjet Marble Mosaic
https://www.marblesystems.com/product/snow-white-verde-tia-honed-windmill-marble-mosaic-11-3-4x13-9-16/ 

Snow White, White Carrara Honed Windmill Waterjet Marble Mosaic
https://www.marblesystems.com/product/snow-white-white-carrara-honed-windmill-marble-mosaic-11-3-4x13-9-16/ 

The mosaic is made with geometry.

In the scene:
Repeating tile element measures 345mm X 298mm. True to scale. Polys of repeat element: 362
For convenience, the object contains a backing (geometry of seams), thanks to which you can quickly reproduce the pattern.

Corona version - 10.
Attention! The model is made using Corona Physical Material (CoronaPhysical Mtl). To use this model, your Corona version must be at least 7.