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  1. Blue II
  2. North Carolina - USGS State Mosaic
  3. Rock pebbles
  4. Oregon. Close-up of Owyhee Picture Jasper stone
  5. Purple I
  6. Close-up of feldspar granite, Sherman Mountains, Albany County, Laramie County, Wyoming
  7. Blue Chrysocolla Jasper
  8. Mineral Spirit II
  9. Barreal Blanco - USGS Earth as Art
  10. San Luis, Argentina - USGS Earth as Art
  11. Natural Agate II
  12. Circle Rain
  13. Meandering Mississippi - USGS Earth as Art
  14. Australian Tiger Eye
  15. Scripted Jasper
  16. Glacial sand deposit
  17. Rhodochrosite, Argentina
  18. Oregon, Owyhee River Valley. Close-up of Morrisonite Jasper
  19. Mineral Spirit IV
  20. Alaska - USGS State Mosaic
  21. Tweezers holding small purple gem, close-up
  22. The Syrian Desert - USGS Earth as Art
  23. Crystals of magnesium sulphate
  24. Geode Abstract III
  25. Tiger Iron I
  26. Purple II
  27. Ocean Jasper from Madagascar
  28. Grey Agate I
  29. Dinosaur Petrified Bone
  30. Small diamonds in row
  31. Grey Agate III
  32. Alabama - USGS State Mosaic
  33. Florida Everglades - USGS Earth as Art
  34. Cut agates
  35. Aqua Mineral
  36. Cerulean Blue Agate I
  37. Close Ups Of Fortification On Crazy Lace Agate
  38. Silver Lace Onyx
  39. Amethyst crystals
  40. Gold core sample
  41. Desert Patterns - USGS Earth as Art
  42. Bismuth crystal
  43. Nebraska - USGS State Mosaic
  44. Marble
  45. Washington - USGS State Mosaic
  46. Marble
  47. Roof of the World - USGS Earth as Art
  48. California - USGS State Mosaic