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  1. Australia - USGS Earth as Art
  2. Family Blessing - Sentiment
  3. Banded Iron I
  4. Oregon, Owyhee River Valley. Close-up of Morrisonite Jasper
  5. Coloured coastal rock
  6. Florida Everglades - USGS Earth as Art
  7. Silica Circus
  8. Vermont - USGS State Mosaic
  9. mineral
  10. Gold core sample
  11. Bismuth crystal
  12. Sanduba marble
  13. Zasite Stone With Rudby
  14. Blue Gemstones Found Near Jodhpur
  15. Rugged Terrain - USGS Earth as Art
  16. Ammonite
  17. Marble
  18. California - USGS State Mosaic
  19. Waziristan Hills - USGS Earth as Art
  20. Lava Cliff
  21. Oklahoma - USGS State Mosaic
  22. Banded sandstone rock
  23. K/T boundary layer
  24. Marble
  25. Scripted Jasper
  26. North Carolina - USGS State Mosaic
  27. Excavation at Galeria
  28. Petrified Wood close-up
  29. Coahuila, Mexico - USGS Earth as Art
  30. Coloured coastal rock
  31. Sandstone Formations in the Fiery Furnace, Arches National Park, Utah
  32. Washington - USGS State Mosaic
  33. Marble
  34. Delaware - USGS State Mosaic
  35. Flourite
  36. Ocean Jasper from Madagascar
  37. Byrd Glacier - USGS Earth as Art
  38. Ocean Jasper from Madagascar
  39. California Jasper
  40. Volcanic ash layers in rock
  41. Malachite
  42. Ocean Jasper from Madagascar
  43. State Posters - Arkansas State Mineral: Quartz
  44. Earth Pyramids, Italy
  45. Sandstone Formations On The Banks Of The Missouri
  46. Alluvial Fan - USGS Earth as Art
  47. Marble
  48. Marble