Across
- 3. The most common mineral in Earth's crust; composed mainly of silicon and oxygen (7 letters)
- 4. This mineral is a major component of limestone and is chemically known as calcium carbonate. (7 letters)
- 7. A mineral often used in pencils, it’s known for its slippery feel. (7 letters)
- 8. This mineral is a common ore of aluminum. (7 letters)
Down
- 1. A common mineral in granite, it’s pink and has a glassy luster. (5 letters)
- 2. This mineral, often found in igneous rocks, has a cubic crystal system. (4 letters)
- 5. The mineral family that includes both garnets and sapphires. (8 letters)
- 6. This mineral is known for its hardness and is often used in jewelry. (7 letters)