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  1. Oregon. Close-up of Graveyard Point Plume Agate stone
  2. Mediterranean Agate II
  3. Indigo Agate I
  4. Grey Agate B
  5. Close Ups Of Fortification On Crazy Lace Agate
  6. Fortifications Agua Nueva Agate
  7. Blue Agate
  8. Stacked Agate II
  9. Pebbles in Blue
  10. Crystalline Serpent I
  11. Mineral of Indigo
  12. Van Gogh from Space - USGS Earth as Art
  13. Amethyst crystals
  14. Oregon, Owyhee River Valley. Close-up of Morrisonite Jasper
  15. Gamboge Agate I
  16. Bolivia, Potosi, Amethyst in a Bolivian museum
  17. Indigo Agate C
  18. Alaska, Lichen covers rocks near Polychrome Pass in Denali National Park, Alaska
  19. Agate 9
  20. Blue Watercolor Agate Rectangle
  21. Glutamic acid crystals, light micrograph
  22. Phthalo Blue Agate I
  23. Malachite
  24. Gem Stones I
  25. No Man's Land - USGS Earth as Art
  26. Chrysocolla
  27. Stacked Agate I
  28. Shattuckite Jasper
  29. Malachite
  30. Ocean Jasper
  31. Prism Agate II
  32. Andes - USGS Earth as Art
  33. mineral
  34. Grey Agate VI
  35. Gem Stones III
  36. Arkansas - USGS State Mosaic
  37. Mississippi River Delta - USGS Earth as Art
  38. View of rocks in water
  39. Always and Forever - Sentiment
  40. Purple Watercolor Agate II
  41. Rainbow Ridge Picture Agate
  42. Agate Studies IV
  43. Mineral Spirit III
  44. Poppy Jasper
  45. Iron pyrites
  46. Limoncello Agate I
  47. Diamond
  48. Cobalt Blue Agate II