Corundum                    Mineral Group: OXIDES
RocksForKids.com

Corundum is the hardest mineral that is easily found in large sizes. Although diamonds are harder, they are very rare. Corundum will scratch almost everything except for diamonds.
The most famous variety of corundum is the ruby.

SPECIMEN ORIGIN: Thunder Bay, Ontario, CANADA
 

 

 


SPECIMEN ORIGIN: INDIA

Ruby


 

RocksForKidsWelcome       Table of Contents                 Contact Us                Grade 4 Rock Talks by Rockhounds       
The Junior Files of E2B2                              ©  1999 - 2009 GMB Services       Grade 4 Pulleys & Gears       Privacy Policy