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A few takeaways: 1) There is an element of "proof of work" in producing these stones: they had to be quarried on Palau Island (300 miles away) and brought by raft. This makes them scarce, and means that to produce them, a certain quantity of labor and goods has to be expended.https://twitter.com/hubert_btc/status/992161895661690880 …
Limestone (pulverized & compressed remains of shells etc., biological crystals of calcium carbonate, so sharing similar durability properties) didn't exist in the unusual geology of Yap. To quarry it, had to take sea expeditions where about half the voyagers never made it back.
This radically changed when Europeans showed up and introduced Euro and Chinese ships to greatly lower the costs and risks of the voyage, and metal tools for quarrying the stone. The biggest stones and the "immobile ledger" tradition date from that era of literal inflation.
So the most memorable and special thing about these stones (the fact that some of them are so huge and hard to move) is actually a result of this ancient, unique currency being debased in the modern era. How interesting and ironic!
Yup. Typical traditional size was probably about like (L), only a little bigger than (and on Yap probably not much less scarce than) the jade bi disks of Neolithic China (R). For display or transfer carried on poles, akin to beads being carried on strings.pic.twitter.com/6W152eWQFj
Proof of sacrifice?
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