When you are researching your mineral, please keep in mind that the websites that are shown below are ones that I have go onto and found to be useful. 

Start with:

 www.worldbookonline.com  which can be found using our Library databases.

Then you can try these websites:

http://www.galleries.com/default.htm

http://www.minerals.net

http://www.oum.ox.ac.uk/thezone/minerals

http://geology.com/minerals