Create a high-quality, detailed illustration showing the four essential components of concrete mixing: Cement, Aggregate, Sand, and Water. Each material should be visually distinct with clear labels beneath them. The cement should be a fine gray powder, the aggregate should appear as a mix of small, rough stones, the sand should have a light brown color and granular texture, and the water should be represented as clear, with a smooth surface and a few droplets rippling. Arrange the components in a grid layout, with each material taking up one quadrant of the image