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New York Times article explores what gemstones tell scientists about the extreme forces at work deep underground
Around 1920, Justo Daza, an experienced mine worker, and Fritz Klein, a mining engineer, were scrambling over the steep mountainside terraces of Chivor, a legendary emerald site in northeast Colombia. They were breaking rocks apart with long iron poles and explosives packed into drill holes.
They were hunting for new emerald veins and not finding any.
Let’s move on, Mr. Klein said. This area is dead.
No, no, no, Mr. Daza insisted. There’s emerald here, I know it.
Mr. Klein shrugged. O.K., one more shot — but that’s it.
Read the full story at https://www.nytimes.com/2017/12/11/science/gemstones-diamonds-sapphires-rubies.html
