Across
- 5. the hardest natural material on earth
- 7. an intensely blue semi-precious stone prized for millenia
- 9. the official stone of Ohio was often used to make arrowheads
- 10. used to make glass
- 13. sedimentary rock formed over millions of years when grains of sand are compacted together
- 14. pencil 'lead' is actually made of this
- 15. like many gemstones, it comes in many colors, but the most famous are blue
- 16. pink variation of #across/down, known as the love crystal
- 18. most common material in minecraft
- 19. a blood-red gemstone
Down
- 1. black volcanic glass
- 2. green stone carved by Chinese artisans for thousands of years
- 3. molten rock
- 4. preserved remains of prehistoric creatures
- 6. brown + golden stone named for a feline
- 8. dark stone with iridescent, peacock-like colors when hit by light
- 11. purple variety of #across/down
- 12. very hard mineral found in many colors, sometimes used for countertops
- 14. a hollow rock with crystals inside
- 17. fossilized tree sap