Sand is a naturally occuring granular material composed of finely divided rock and mineral particles. Sand is mainly found under or near bodies of water generated by the world. Although it is easy to obtain from the start, sand is an easily exhausted resource in Dig Deep mode if actively harvested.
Sand does not serve as a crafting purpose currently, however, it can be smelted to create glass. Glass is smelted in a furnace. Sand is usually found near the surface and is best obtained using a shovel. It cannot be crafted. Sand can be bough for 10 gold pieces and sold for around 3 gold pieces in the Block Shop.