Re:For precision, the sapphire clock outshines even the best...
by dwd on Friday August 20, 2021 @08:50PM
(#28253059)
Reminds of the Anne McCaffrey Crystal Singer series where crystals were mined for use in their space-faring technology. Each crystal was unique and would be tuned to a particular use.
https://en.wikipedia.org/wiki/Crystal_Singer