Is color jk in diamonds a good diamond?

Answer 1

'Good' is a judgment, and you are the judge.

A 'white' diamond in the J-K colour range has value. For example, today at Blue Nile you can compare two 2.03/4 carat diamonds, both J colour, the more expensive (US$13,286) being Internally Flawless and Cushion cut, and the less expensive (US$7,542) being VS-2 clarity and Emerald cut.

The monetary value is in the clarity, not in the colour or the cut of the diamonds.