You may have been shown a diamond grading report in both cases, diamond grading reports are often referred to as diamond certificates. If you want a jazzy pair of earrings with low price tag than gold is a good choice. Gold hoop earrings are very trendy you can go for chunky pair or just simple subtle one.
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 K color is the first letter in faint yellow category. K color diamonds set in yellow gold settings look just fine. Go for a strong diamond fluorescence. It will compensate yellowish color effects. One may want to sacrifice diamond color for the sake of bigger size. K color diamonds are just perfect for that.
Clarity The stones of SI2 clarity have inclusions which are fairly easy to see under a loupe with 10X power magnification. Such inclusions may be visible to an unaided eye depending on their location. SI2 clarity diamonds of G or H color look nearly perfect when mounted. For those looking for near perfection these sure come close.