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  1. Agate Sample
  2. Barreal Blanco - USGS Earth as Art
  3. Volcanoes - USGS Earth as Art
  4. Pietersite from Namibia
  5. Silver Lace Onyx
  6. Quartz
  7. Alaska - USGS State Mosaic
  8. Tiger Eye
  9. Niger River - USGS Earth as Art
  10. Coloured coastal rock
  11. Blue lace agate
  12. Swirl pattern on Deschutes Jasper Slab
  13. Geode Abstract IV
  14. Alluvial Fan - USGS Earth as Art
  15. State Posters - South Carolina State Gemstone: Amethyst
  16. Lava Cliff
  17. Dragon Lake - USGS Earth as Art
  18. Chemicals and rock samples in Darwin's study
  19. Colorful Petrified Dinosaur Bone
  20. Edrengiyn Nuruu - USGS Earth as Art
  21. Marble
  22. The Dardzha Monster - USGS Earth as Art
  23. Agate 2
  24. Yukon Delta - USGS Earth as Art
  25. Pattern In Wet Stone
  26. Agate 1
  27. Healing Crystal II
  28. Bolivian Deforestation - USGS Earth as Art
  29. Terkezi Oasis - USGS Earth as Art
  30. Byrd Glacier - USGS Earth as Art
  31. Mineralogie IV
  32. Cerulean Blue Agate II
  33. High Angle View Of Basalt Rocks, Giant's Causeway, County Antrim, Northern Ireland
  34. Earthy Minerals
  35. Sea salt, SEM
  36. Dasht-e Kevir - USGS Earth as Art
  37. Tennessee - USGS State Mosaic
  38. Giant's Causeway, County Antrim, Ireland
  39. Stratified rock at Agio Pavlos, island of Crete, Greece, Mediterranean
  40. Gold core sample
  41. Oregon. Close-up of Owyhee Picture Jasper stone
  42. Oregon. Close-up of Owyhee Picture Jasper stone
  43. Stone Sliver I
  44. Purple II
  45. Gold Leaf Agate
  46. Agate 5
  47. Wisconsin - USGS State Mosaic
  48. Agate 3