It would be an issue if someone nuked Spruce Pine as it would take a reasonable amount of time to survey and prepare mining infrastructure for other sites.
High purity quartz is very important but there's probably enough existing inventory for the mines to commence operating again (and there's still all the stuff in the refining and purification chain).
It's just concentrated in NC because it's relatively cheap and low volume - $5 a kg, similar to the price of zinc except that zinc mining and demand volumes are ~100 times higher. They have the biggest known deposit so there's no point to develop your own mining and refining industry unless you think your country will be cut off.
Or another example, most of the world's cobalt is mined in the Democratic Republic of the Congo, and there would be huge supply chain disruptions if you nuked the DRC - but that doesn't mean that cobalt has little value. Of course in they scenario, other mines would open (or reopen, in the case of Australia which was the primary cobalt producer until the ~late 90s).
It would be an issue if someone nuked Spruce Pine as it would take a reasonable amount of time to survey and prepare mining infrastructure for other sites.
High purity quartz is very important but there's probably enough existing inventory for the mines to commence operating again (and there's still all the stuff in the refining and purification chain).
It's just concentrated in NC because it's relatively cheap and low volume - $5 a kg, similar to the price of zinc except that zinc mining and demand volumes are ~100 times higher. They have the biggest known deposit so there's no point to develop your own mining and refining industry unless you think your country will be cut off.
Or another example, most of the world's cobalt is mined in the Democratic Republic of the Congo, and there would be huge supply chain disruptions if you nuked the DRC - but that doesn't mean that cobalt has little value. Of course in they scenario, other mines would open (or reopen, in the case of Australia which was the primary cobalt producer until the ~late 90s).