1. Vocab #6 Text pages 70-73

2. luster the way a surface reflects light

3. streak the color of a mineral in powdered form

4. Mohs Hardness Scale A list of 10 minerals classified by hardness. Talc is #1 (softest) and diamond is #10 (hardest)

5. cleavage tendency of a mineral to break along smooth, flat surfaces

6. diamond a precious stone consisting of a clear and typically colorless crystalline form of pure carbon, the hardest naturally occurring substance

7. talc a very soft mineral that is a basic silicate of magnesium, has a soapy feel, and is used especially in making talcum powder

8. magnetite is the most magnetic of all the naturally occurring minerals on Earth

9. quartz - is the basic building block of many rocks

10. pyrite a mineral commonly called “fool’s gold.” is a brass-yellow mineral with a bright metallic luster

11. calcite a white or colorless mineral consisting of calcium carbonate (Calcite will ‘bubble’ when you pour a weak acid (such as vinegar) on it.)