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  1. Pebbles I
  2. Diamond
  3. Cobalt Blue Agate II
  4. Autumn Agate I
  5. The Optimist - USGS Earth as Art
  6. Chewy Minerals
  7. Sierra de Velasco - USGS Earth as Art
  8. Gold nugget held in tweezers
  9. Plum Agate I
  10. Purple Watercolor Agate I
  11. Lapis Lazuli Agate I
  12. Patterns created by sea erosion on rocks, Northumberland England, UK
  13. Desert Agate II
  14. Plenty Of Blue Agates
  15. Von Karman Vortices - USGS Earth as Art
  16. Indigo Agate D
  17. Florida - USGS State Mosaic
  18. Blood Orange Agate II
  19. Algerian Sahara - USGS Earth as Art
  20. Quartz Top II
  21. Moss Agate
  22. Lapis Lazuli Agate II
  23. Cadmium Orange Agate I
  24. Karman Vortices - USGS Earth as Art
  25. Quartzsite
  26. Kentucky - USGS State Mosaic
  27. Lena Delta - USGS Earth as Art
  28. Wingate Pass Agate, Ca
  29. Bogda Mountains - USGS Earth as Art
  30. Akpatok Island - USGS Earth as Art
  31. Mineral Spirit I
  32. Watercolor Agate I
  33. Banded Iron II
  34. Virginia - USGS State Mosaic
  35. Pebbles on a beach
  36. Photography of agate, Stone material, Close Up
  37. Cadmium Orange Agate II
  38. Oregon, Owyhee River Valley. Close-up of Morrisonite Jasper
  39. Quartz crystals
  40. Earth Agate IV
  41. Wisconsin - USGS State Mosaic
  42. Blue Cliff Chrysocolla
  43. Agate 10
  44. Aster Agate II
  45. New Mexico - USGS State Mosaic
  46. Grey Agate IV
  47. Colorado - USGS State Mosaic
  48. Purple Jasper