Yes, sand in the desert and beaches is "too old", in other words, it's too smooth and can't hold material together. That's why Dubai is importing huge amounts of sand while being literally a city in the desert.

Got it. I'll just make me some concrete... Alright I need

1. Cement mix
2. Pebbles
3. Sand.. oh shit.

Put rocks through the "coarse" setting on your coffee grinder.

Same way nature does, grind up bigger rocks

By rubbing sandpaper..duh

Shells, coral, and a whole lot of time.

I heard that in the high pitched voice of Jar Jar Binks