The key here, especially if you're new to diamonds, is to pay close attention to all of the information here. The pertinent factors here, in no particular order, are:

I2-I3: For inclusions (things in the diamonds), I2 and I3 are way down at the end of the scale. The diamonds I received have nothing visible to my naked eye. With a small, hand-held microscope, I was able to see inclusions, though.

Color J-K: These categories straddle the near colorless/faint yellow border. The pair I received are toward the colorless side with no obvious coloration.

1/5 cttw: The total carat weight. These diamonds are quite small. A rough estimate (I did a comparison) is that each diamond's width is slightly larger than the width of the nib of a standard ballpoint pen, perhaps 50% wider.

With all of that said, these earrings were better than I expected, at the high end (though I didn't actually weigh the stones or have them professionally assessed) of each category. As I assume that anyone purchasing these is not well-versed in diamonds (or would be buying higher quality jewelry), I have included the information above. I do recommend, however, that the potential buyer read the more detailed information on this site. But if this is what you're looking for, the earrings seem sturdy and likely to last a while.