GEMS

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Across
  1. 2. Repeated, imitated, or copied. [P]
  2. 5. American river. [P]
  3. 9. Round like a ball. [P]
  4. 11. Easily cracked. [E]
  5. 12. Made by humans in imitation of nature. [P]
  6. 13. Related to volcanoes. [D]
  7. 14. The characteristic of being easy to see through. [E]
  8. 17. Making something smooth and shiny by rubbing. [D
  9. 18. Small amounts. [RS]
  10. 20. Melted in liquid. [P]
Down
  1. 1. Clearness of appearance. [E]
  2. 3. Basically; fundamentally. [RS]
  3. 4. Color. [RS]
  4. 6. A distinctive mark or characteristic that identifies something. [E]
  5. 7. Delicate. [E]
  6. 8. Found. [D]
  7. 10. A well-known building. [P]
  8. 15. Footwear. [RS]
  9. 16. Someone who invented something. [P]
  10. 19. Easy to see through. [RS]