Okay, maybe I'm an idiot, but this is one of those facts I'd missed until recently. Despite the impression you may have gotten from grade school and/or old Superman cartoons, diamonds are probably not lumps of coal that just got compressed real good—at least, not in exactly the way you might imagine.
Diamonds are made out of carbon, but the best evidence suggests that they form far more deeply down in the Earth than coal does. Instead of coal being smushed into diamonds, imagine something more like those "grow crystals out of Borax and water" experiments you did in grade school. Only, in this case, the experiment is performed in the fiery depths of Hell, as very un-coal-like atoms of carbon are compressed and heated deep in the Earth's mantle until they start to bond together and grow into a crystalline structure.
Once the crystals are formed, they get to the surface of the Earth via volcanic eruptions.
The really interesting thing about all of this is that it's one of those ideas that's very hard to verify. Diamonds form at a depth we can't go observe directly. All we have to work with is indirect evidence. Because of that, nobody knows exactly where the necessary carbon to make diamonds comes from. This is why the "diamonds are coal" story exists. Some scientists think the carbon is stuff that's existed in the Earth since this planet was formed. Others think it might be coming from terrestrial carbon that got shifted down to the lower levels via plate subduction—although, even then, we're talking about carbon, but not necessarily coal. It could be a combination of both. Either way, the mental image of smushed coal doesn't quite work.
Read the American Museum of Natural History's explanation of where diamonds come from
Read an interview about diamonds with the curator of the U.S. National Gem and Mineral Collection
Thanks to a story written by Geology.com's Hobart King for busting the myth and inspiring to me to read a little more on this
Image: Diamonds, a Creative Commons Attribution (2.0) image from kimberlyeternal's photostream
On August 3 in celebration of the 40th anniversary month of the Voyager interstellar mission, please join me at San Francisco’s Exploratorium to experience the Voyager Golden Record with two of the brilliant minds behind it — SETI pioneer Frank Drake and science writer Timothy Ferris. In August and September 1977, NASA launched two spacecraft, […]
The Chinese government’s wish-list for AI researchers is pretty ambitious: “Breakthroughs should be made in basic theories of AI, such as big data intelligence, multimedia aware computing, human-machine hybrid intelligence, swarm intelligence and automated decision-making.”
A scrap dealer cleaning out a deceased engineer’s basement in Pittsburg, Pennsylvania found two massive 1960s computers, magnetic tape data storage systems, and hundreds of tape reels, all of which was marked as the property of NASA. The scrap dealer called NASA to report what he found and the agency’s Office of the Inspector General […]
The TREBLAB X11 Earphones are versatile, offer great sound, and are currently $32.99 in the Boing Boing Store.These Bluetooth earbuds are a great workout companion. They’re totally sweat proof and their ear-fins keep them snugly in place during high activity — something that Apple’s AirPods can only do if you were blessed with precisely the […]
Whether you’re a seasoned entertainment industry veteran or a student working on your first spec script, having the right tool for the job will make a huge difference in your focus and productivity.Final Draft 10 is far and away the world’s best screenwriting software, used extensively by professional film and TV writers at top production […]
Web content creators who don’t have a solid SEO strategy should take note of Webtexttool. It’s a service that pulls in anonymous data from their entire user base to offer crowdsourced guidance that increases your search page ranks. By analyzing prior user successes, it helps you better gauge how your posts will perform at a […]