Across
- 1. molten rock below the ground
- 3. the hardest crystal
- 4. metamorphic rock used for sculptures
- 5. Minerals often occur in beautiful shapes and
- 7. science of rocks
- 11. a blue precious gem
- 12. natural substances with crystals in patterns
- 13. often called volcanic glass
- 15. expensive crystals
- 16. the layer of Earth on which we live
- 17. extrusive rock with small crystals
- 18. element 26 in the periodic table which makes
- 19. molten rock above the ground
Down
- 1. next layer after the crust
- 2. a green gem
- 4. type of rock made from igneous or sedimentary
- 6. a red gem
- 8. igneous formed above ground
- 9. rocks made by cooling magma
- 10. type of rock made from small bits of material
- 12. than 80% of the earth core
- 14. igneous formed below the ground