Scottish Rocks, Minerals and Gems

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Across
  1. 5. The dark volcanic rock that forms Staffa island columns
  2. 6. The warm red stone used to build Glasgow tenements
  3. 8. A hard sharp historic stone used to create ancient tools
  4. 10. The incredibly tough grey stone used to build Aberdeen city
Down
  1. 1. A smooth rounded river stone found in mountain streams
  2. 2. A bright shiny white crystal found in Highland mountains
  3. 3. A beautiful smooth stone found on the Isle of Skye
  4. 4. A rare precious metal panned in the hills of Wanlockhead
  5. 7. A beautiful colorful gemstone found on traditional Scottish beaches
  6. 9. The dark mineral mined historically to heat Scottish homes