Across
- 2. a rare mineral that doesn't rust
- 4. the colour of the mark left by scraping the mineral on a white unglazed tile
- 7. physical property based on ability to scratch particular mineral
- 9. represented as 'C' on the periodic table
- 10. how shiny a mineral is
Down
- 1. used for wiring and represented as 'Cu' on the periodic table
- 3. the hardest substance
- 5. the colour a mineral glows when heated to a high temperature in a flame
- 6. rocks containing minerals
- 8. used to create electricity