Michigan Minerals!

http://www.webmineral.com/data/Gypsum.shtml- GYPSUM MINERAL DATA

http://www.minerals.net/mineral/sulfates/gypsum/gypsum.htm#Picture- GYPSUM

GYPSUM.

1.CaSO4.2(H2O)

2.Used for wallboards and plastic products.

3.Colorless, white, gray, black, pink, many colors

QUARTZ.

1.SiO2

2.Quartz is used mostly for jewelry

3. Comes in various colors.. mostly any color in the rainbow.

http://www.webmineral.com/data/Quartz.shtml- QUARTZ MINERAL DATA