Global Diamond Exchange, Inc. (GBDX)

[surfkast]

Diamonds are cut in different styles. Many times the cut is determined by the charecteristics of the diamond itself. You will always want to get a stone with the best charecteristics and eye appeal. An emerald is also another precious stone. Google diamonds or diamond dealers and you will find a wealth of information on diamonds and probably other precious stones starting wirh the 4C's on diamond grading.
Hope this helps.