You should only buy diamonds that have been certified by one of the recognised grading laboratories. In case of your sister it could include chocolates, jewelry or CD's of songs. Guess what the hottest fashion statement for Fall and Winter 2006 is.
Explanation of Cut, Color and Clarity of This Diamond
Cut Quality Diamonds of premium cut are almost as good as ideal. While nature determines the color and clarity of a stone, diamond cut is dependent solely upon the skill of the cutter. Premium cut diamonds may be close to the ideal cut proportions and look just identical. Most people cannot distinguish between the two. However, there is a slight difference in quality and reduction in price over ideal cut diamonds.
Color When mounted, G color grade diamonds will appear colorless except to the trained eye. G color may be noticeable when compared to diamonds of better grades. Diamonds of G color grade offer excellent value. For an excellent value in a diamond with no noticeable color to the unaided eye, G color diamond is the right choice.
Clarity SI2 clarity diamonds are slightly included grade two. SI2 inclusions in diamonds are easily visible under 10x magnification. These inclusions may or may not be discernable to the naked eye depending on their location on the diamond, but these diamonds still presents an excellent value.