The Blood Diamonds are normally smuggled out as rough diamonds which have yet to resemble anything that we see in a shop window. So I would not recommend wasting your money, it may be ok for cleaning other things but not jewelry. The technique I prefer may not be suitable if you have just a few personal pieces of jewelry.
Explanation of Cut, Color and Clarity of This Diamond
Cut Quality Good cut diamonds reflects most light that enters the diamond, but not as must as a premium cuts. They are less expensive than the premium-cut. Roughly 25% of diamonds are good-cut based on cut quality. This grade represents an excellent balance between quality and price.
Color Diamonds of I color are right in the middle of near colorless category. Experienced eye should be able to notice the presence of color. When mounted, I color diamonds will appear colorless to the most people representing great balance between price and perfection.
Clarity VVS2 diamonds have very very small inclusions which, when viewed under 10X magnification by an expert, are difficult to be seen. The inclusions should be light colored. The features of the VVS2 clarity grade are exceptionally difficult to discern. Diamonds of this clarity appear to be perfect to an unaided eye.