ashley cruz asked 10/3/2011 The coinage metals-copper,silver, and gold-are considered to be a chemical family. Liste three arguements to explain why?
Jason Wilson asked 6/23/2011 What is the difference between rough diamonds and polished diamonds? How do I know the quality of rough diamonds?
michelle loveland asked 9/28/2007 What Is The Streak Of A Diamond I Think It's Clear But I'm Not Sure?