#26 Diamonds Are Extracted From Coal Mines
Diamonds are heaps of compressed carbon molecules that are formed nearly 100 miles below the Earth’s surface in the upper mantle. It’s, therefore, rational to assume that the temperature and pressure deep below the Earth’s crust are humongous, which cause the formation of diamonds.
Now, we haven’t yet invented the technology to drill that deep, so how did exactly the diamonds swim their way up to the mineable surface? According to geologists, the diamonds that we mine today were coughed up to the Earth’s surface due to violent volcanic eruptions, presumably a very long time ago when the Earth was way hotter.
Hence, fragments of volcanic material that travelled from the upper mantle to the Earth’s surface and eventually cooled down turned into diamonds.