Argentium - how much do you know?!

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Across
  1. 1. Stamp used to identify metals
  2. 3. Opposite of darker, relevant to Argentium!
  3. 5. Large USA jewellery show
  4. 6. Alloy ingredient in many metals
  5. 11. Well know US Argentium instructor
  6. 12. Small tool for grinding metal
  7. 13. Argentium Inventor
  8. 16. Item worn on wrist
  9. 18. Less allergic reactions
  10. 21. Insect seen in summer, security for earrings
  11. 23. What holds rub over stones in place
  12. 25. Iconic Titanic stone
  13. 27. Can be done to metals or fingernails
  14. 29. These can hold stones in Place
  15. 30. Not bright polished, fabric
  16. 31. Argentium logo
Down
  1. 2. Resisting bacteria
  2. 4. Alloy ingredient in Argentium, sounds like a flower!
  3. 7. Term for cleaning metals or preserving vegetables
  4. 8. Always a girl's best friend
  5. 9. Process for reducing wire gauge
  6. 10. Term for cooling metals in water
  7. 14. Famous US river and Argentium supplier
  8. 15. Process of mixing metals
  9. 17. June Birthstone
  10. 19. Increased Purity
  11. 20. Hawaiian based host of Network site
  12. 22. Type of ounces used for metal
  13. 24. Balls made from melted Argentium
  14. 26. Process for shinning metals
  15. 27. Technique for spoon making or cheating!
  16. 28. Technique for joining without solder unique to Argentium