Thinking about how for ~2000 years, the "cardinal gems" were an unchanging set of the five most valued stones (amethyst, diamond, emerald, ruby, and sapphire), with all sorts of myth and lore... until absurdly vast quantities of amethyst were found in Brazil and it got demoted
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Replying to @JakeNelsonMN
There's a tiny pyramid of aluminum at the tip of the Washington Monument because of some very regrettable timing around industrial-scale electrolysis https://www.tms.org/pubs/journals/JOM/9511/Binczewski-9511.html …
5:23 PM - 2 Aug 2019
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