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Geological Labyrinths of Onyx Structures
Challenging puzzle for experienced crossword solvers
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Across
  • 1. Exhibiting multiple colors due to mineral impurities or structural effects
  • 2. Marked by zones or bands, describing onyx's characteristic appearance
  • 3. Rock fragment included within another rock, foreign to host formation
  • 5. Microscopic crystal form invisible to the naked eye
  • 6. Having two distinct surfaces, often describing layered mineral formations
  • 8. Undulating color or texture pattern seen in certain onyx varieties
  • 10. Transition of a substance from solid to gas phase without liquid
  • 11. Having the form or arrangement of layered deposits
Down
  • 4. Process of replacing organic material with silica compounds
  • 7. Alternating strata indicative of sedimentary or mineral deposition
  • 9. Light diffusion through a material without clear definition
  • 12. Cryptocrystalline form of silica forming translucent bands
  • 13. Degree to which light passes through a mineral sample
  • 14. Type of fracture resembling shell-shaped curves in siliceous minerals
  • 15. Composed of fine, thread-like fibers, typical in certain mineral textures
  • 16. Development of distinct compositional bands within crystals or minerals

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