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Diamond. (2012, October 12). In Wikipedia. Retrieved November 3, 2012, from http://en.wikipedia.org/wiki/Diamond

Diamond - physical and chemical properties. (2006, November 8). In Farlangs. Retrieved November 3, 2012, from http://www.farlang.com/diamonds/crookes_diamonds/page_113

The physical properties of diamonds (n.d.). In Abazias diamonds. Retrieved November 3, 2012, from http://www.abazias.com/diamondblog/diamond-education/the-physical-properties-of-diamonds

How are diamonds used?. (n.d.). In Projects by students for students. Retrieved November 3, 2012, from http://library.thinkquest.org/5008/Used.htm

How does diamonds affect the enviroment?. (n.d.). In The Q&A Wiki. Retrieved November 3, 2012, from http://wiki.answers.com/Q/How_does_diamonds_affect_the_environment

Why are diamonds used in bits of drills?. (n.d.). In The Q&A Wiki. Retrieved November 3, 2012, from http://wiki.answers.com/Q/Why_are_diamonds_used_in_bits_of_drills

Why are diamonds used to make drill bits?. (n.d.). In The Q&A Wiki. Retrieved November 3, 2012, from http://wiki.answers.com/Q/Why_are_diamonds_used_to_make_drill_bits