AANSWER THE FOLLOWING QUESTIONS AND EARN (0.5 pts) FOR EACH ANSWER. NOTE: The questions will change every week, maybe more!

What is the chemical formula for (a) and use of (b) each of the following substances?
1) CINNABAR
2) KAOLINITE
3) CARBORUNDUM
4) OIL OF VITRIOL
5) ABIETIC ACID
6) WATER GLASS

AN EXTRA QUESTION: What do sapphires have in common chemically (a), how are they chemically different (b), and they both fall under the class of mineral called what? (c)