The world's semiconductor industry hinges on a single quartz factory in North Carolina
www.tomshardware.com
The deposits formed 380 million years ago when Africa collided with North America.

https://www.pbs.org/newshour/nation/rescue-crews-rush-to-north-carolina-mountain-towns-cut-off-by-helene-floodwaters

yea

Quick google search shows that China has its own Quartz mines, so I'm not sure if those are unsuitable for certain semiconductors or if the use of "world" here just means international-community-1

  • barrbaric [he/him]
    ·
    4 hours ago

    From the article, seems like it was due to unique geological properties.

    Geologically speaking, the uniquely pure minerals at Spruce Mine were created about 380 million years ago when Africa collided with North America. This momentous collision, however slow, caused intense friction and heat miles below the Earth’s surface. According to Sibelco, the Spruce Mine minerals were created by a rich mineral-forming liquid that cooled and crystallized over time. A standout feature of these minerals is that they were made in their purest forms due to a lack of water, which caused all the friction.

    It does later say that similarly high purity can be reached with synthetic quartz but that it would take time to scale up that industry.