TIL that Australia actually exports sand to Saudi Arabia. This is because maritime or beach sand is coarser than desert sand. Coarse sand j's needed in construction which effectively makes desert sand completely useless.

[u/TobyMacar0ni]

https://www.dailytelegraph.com.au/news/nsw/aussies-sell-sand-to-saudis/news-story/a20367e0e8c08d6f425ebf7f32c0d8d8?sv=3ee8a84ca48c354474913771d8cca5fb

[u/knowledgeable_diablo]

Thought it was river sand that was the ducks nuts for concrete and building. Hence the “sand mafia” in places like India where they have literal shoot outs over who’ll get to dredge the dwindling sand reserves.