By Laura Dolezal... Insert pictures of different types of quartz... Quartz is very hard.Insert picture of quartz... Quartz is transparent or translucent.Insert picture of quartz.
Trang 1By Laura Dolezal
Trang 2Insert pictures of different types of quartz
Trang 3Quartz is very hard.
Insert picture of quartz
Trang 4Quartz is transparent or translucent.
Insert picture of quartz
Trang 5http://www.minerals.net/mineral/silicate/tecto/quartz/quartz.htm