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  1. Bismuth crystal
  2. Glutamic acid crystals, light micrograph
  3. Gold nugget held in tweezers
  4. Bismuth crystal
  5. Mining drill core sample with gold content
  6. Sea salt, SEM
  7. Molecular model of quartz
  8. Quartz Crystals, SEM
  9. Crystals of magnesium sulphate
  10. Gold core sample
  11. Bismuth crystal
  12. Copper sulphate crystals, LM
  13. Sodium Phosphate Crystals, SEM
  14. Chemicals and rock samples in Darwin's study
  15. Zeolite Crystals, Polarised LM
  16. Phosphate Crystal, SEM
  17. Sapphire, SEM
  18. Quartz Crystals, SEM
  19. Quartz Crystals, SEM