Stones crossword

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Across
  1. 4. A dark, fine-grained volcanic rock.
  2. 8. A common type of hard, igneous rock often used in construction.
  3. 9. A sedimentary rock mainly composed of calcium carbonate.
  4. 10. A sedimentary rock composed of sand-sized mineral particles.
Down
  1. 1. A soft, white, porous sedimentary rock.
  2. 2. A naturally occurring volcanic glass.
  3. 3. A metamorphic rock known for its use in sculpture and architecture.
  4. 5. A fine-grained metamorphic rock used for roofing.
  5. 6. A hard mineral found in many types of rocks.
  6. 7. A hard type of sedimentary cryptocrystalline form of the mineral quartz.