Rocks and stones are natural formations of minerals that can be used to create the most primitive [technology](technology.md). Stone age was the first stage of our civilization; it was characterized by use of stone tools. Rock [nerds](nerd.md) are called geologists.
Rocks are pretty [suckless](suckless.md) and [LRS](lrs.md) because they are simple, they are everywhere, free and can be used in a number of ways such as:
- As a building material.
- For [fun](fun.md) and entertainment, you can play various games with rocks: rock skipping, petanque, even [chess](chess.md).
- As [weapons](weapon.md), even though we discourage this use.
- For making tools such as [knives](knife.md) or [hammers](hammer.md).
- To hold heat: you can e.g. heat stones in fire and let them heat you while you sleep or use them to cook something.
- For writing, some can be used as a chalk, some may be used to carve text into. A dust from some rocks can be used to make dye to paint or write with.
- As weights.
- For help with counting (e.g. [abacus](abacus.md)) -- this makes rocks a kind of [computer](computer.md)!
- To make [art](art.md), decorations, small statues etc.
- For breaking things, grinding, sharpening etc.
- With advanced technology we can get metals out of rocks, extract geological knowledge from them etc.
- Some rocks can be used to start [fire](fire.md).
