The grade will tell you more about the clarity and the loupe will allow you to see the diamond under a greater magnification. Alternatively you can clean the copper jewelry with salted limejuice or soak it in a small solution of lemon. The common abbreviation used to marking platinum jewelry is plat.
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 J color diamonds are more or less colorless. J color will be slightly detectable to the experienced eye. When cut to ideal proportions, the diamond will produce a warm intensity. This diamond is an excellent value for the budget conscious. J-color diamonds are the least expensive of the near-colorless grades.
Clarity Inclusions and external blemishes in diamonds of SI1 clarity may be easy to spot under 10X power magnification. Location of the inclusions greatly affect their visibility to the naked eye. SI1 diamonds of good color produce as good of a sparkle as the more expansive VS graded stones of lower color. Excellent bargains may be fond in this category.