Item - B152

• How can platinum help reduce air pollution?
• What make rubies red and sapphires blue?
• Why is graphite used to make pencils?

The answers to these questions and many more are packed within the pages of this 4" x 5" book.

D K Pockets are a major new series of reference guides, small enough to fit in a pocket but comprehensive enough to provide an in-depth look at each subject. Pockets may be compact, but they are bursting with text and pictures. Within the covers, the enthusiast will find essential facts on the subject, plus a valuable reference section packed with charts and lists. These highly collectible guides are fascinating and easy-to-use mini-information books that gather everything you need to know about a subject - and put it in your pocket!