Explore key people featured in Onix with this medium-difficulty crossword puzzle designed for kids ages 8 to 12. Learn about major characters and their roles.
Geological Enigma: Onix Rock Lexicon is a hard crossword puzzle with 20 clues covering . Play it online for free below, or create your own crossword with our free crossword maker.
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Geological Enigma: Onix Rock Lexicon
Challenging puzzle for experienced crossword solvers
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Across
- 1. Red herring: biologically unrelated velvet worm, test solver’s attention
- 2. Describes minerals with long-range atomic order
- 3. Texture resembling thin thread-like mineral aggregates
- 4. Rock type transformed under heat and pressure
- 5. Microcrystalline quartz that forms many varieties including onyx
- 9. Quartz variant displaying chatoyancy, named for feline pattern
- 10. Scientific study of mineral properties and formation
- 12. Opaque variety of chalcedony often used in ornamental carvings
- 13. Characteristic parallel layers in sedimentary rock formation
- 16. Lustrous, glass-like surface quality in minerals
Down
- 6. Layering structure common in sedimentary and banded stones
- 7. Visual texture resembling network fractures in stones
- 8. Type of rock formed by accumulation of mineral and organic particles
- 11. Refinement process revealing banded patterns in gemstones
- 14. Process of successive mineral layering or changes
- 15. Polymorph of calcium carbonate distinct from calcite
- 17. Sedimentary rock primarily composed of skeletal fragments
- 18. Cryptocrystalline silica rock often mistaken for flint
- 19. Green mineral indicating metamorphic transformation
- 20. Volcanic glass often mistaken for dark onyx
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