Cubic Zirconia is probably the closest man made material to the looks, hardness and feel of real diamond. Understand that most flawless stones are saved for pieces that feature a single stone, such as rings or pendants. Because of this, tennis bracelets will still be rather expensive, but rarely will contain flawless stones.
Diamond Certificate
Explanation of Cut, Color and Clarity of This Diamond
Cut Quality The ideal cut diamond is a very precise mathematical equation, where diamond proportions and angles are cut to optimize the diamond's superlative optical properties, in particular it's high refractive index and color dispersion, to create a diamond of unequaled beauty with perfect balance of brilliance and fire. In layman's terms, the diamond is cut to make it the most beautiful diamond so it retains its intrinsic value.
Color G color diamonds are next to colorless. G color may be somewhat slightly noticeable when compared to diamonds of better grades, but this grade offers excellent value. G-color diamonds are the most rare of the near-colorless diamonds. Its extremely faint tint will only be noticeable to a trained gemologist.
Clarity SI1 clarity diamonds are slightly included. SI1 diamonds have some inclusions visible under 10x magnification but not easily visible to the naked eye. A diamond with this grade of clarity is an excellent choice for someone on a limited budget.