QUESTIONS ABOUT :

Why Are Some Minerals Classified as...

They are less common then other elements
http://wiki.answers.com/Q/What_are_some_minerals_c...
Gemstones are minerals with either rarity, hardn.
http://www.chacha.com/question/why-are-some-minera...
Because sugar can be used for energy Anonymous
http://www.blurtit.com/q8825937.html
Depending on the composition, we can classify minerals in five kinds.The first major categories: Natural mineral elements , the second largest category: Sulfide minerals and simila...
http://www.blurtit.com/q8745381.html
A rock is considered to be an ordinary object that is not worth much. But certain rocks contain materials that people find useful, they could then be considered a mineral. Mineral ...
http://www.blurtit.com/q286630.html
Useful sites about:

Why Are Some Minerals Classified as...

What are some minerals classified as gems? They are less common then other elements. Why are some minerals classifyes as gems? Because of their shiny ...
wiki.answers.com
They are less common then other elements. Why are some minerals classified as gems? Because these certain elements are less common than other elements ...
wiki.answers.com
Some minerals are classified as gems if they have value for use as adornment. The mineral is classified a gem based on its beauty and how rare it is. Some ...
uk.ask.com