Sand doesn't have crystals that reflect the sun in the way that a diamond or a prism does. However, it *does* reflect sunlight, and here's why:

* Sand is made of tiny particles: These particles can be of various materials like quartz, feldspar, and shell fragments. These particles are irregular in shape, meaning they have many surfaces.

* Light scattering: When sunlight hits these irregular surfaces, it scatters in many directions. This scattering is what makes sand look so bright and shimmery, especially when wet.

So, while sand doesn't have a crystalline structure like gemstones, it does reflect sunlight due to the scattering of light off its many tiny surfaces.