How much does sand sell for?

As a keen observer of the cryptocurrency and finance landscape, I'm curious to delve deeper into the nuances of digital assets and their real-world equivalents. Specifically, I've noticed that certain cryptos, colloquially known as 'sandbox' currencies, seem to draw comparisons with tangible commodities such as sand. So, my question is: How much does sand sell for in the context of these digital assets? Is there a direct correlation, or is this simply a metaphorical reference? If there is a quantifiable value, what factors determine its price fluctuations? I'm keen to understand the economics behind this fascinating intersection of the physical and digital worlds.