Minerals

2. – a hard mineral composed mainly of silicon dioxide and commonly found in many rocks.
4. – a dark amphibole mineral found in many igneous and metamorphic rocks.
6. – a yellow iron sulfide mineral often mistaken for gold.
7. – a mineral made of calcium fluoride, valued for its variety of colours.
8. – an iron oxide mineral that is an important source of iron.
9. – a mineral that easily splits into thin, flexible sheets.
11. – a group of silicate minerals used as gemstones and abrasives.
12. – the softest known mineral, commonly used in powders and cosmetics.
14. – a naturally occurring form of carbon that is the hardest known mineral.
15. – a dark-coloured mica mineral commonly found in igneous rocks.
16. – a green silicate mineral commonly found in volcanic rocks.
17. – the natural mineral form of sodium chloride, commonly known as rock salt.

1. – a magnetic iron oxide mineral commonly found in igneous and metamorphic rocks.
3. – a soft mineral used in making plaster and fertilizer.
5. – a soft clay mineral used in the manufacture of ceramics and paper.
7. – a common group of rock-forming minerals that make up much of Earth's crust.
10. – a carbonate mineral that is the main component of limestone and marble.
11. – a soft form of carbon used in pencils and lubricants.
13. – a naturally occurring inorganic solid with a definite chemical composition and crystal structure.
14. – a carbonate mineral containing calcium and magnesium, often found in sedimentary rocks.