Final answer:
A four carat diamond (A) will be worth more than another of the same weight (B) if the quality or characteristics of diamond A are superior to those of diamond B.
Step-by-step explanation:
A four carat diamond (A) will be worth more than another of the same weight (B) if the quality or characteristics of diamond A are superior to those of diamond B.
The value of a diamond is determined by the combination of the 4Cs: carat weight, color, clarity, and cut. If diamond A has a higher color grade, better clarity, or a more desirable cut than diamond B, it can be worth more despite having the same weight.
For example, if diamond A has a higher color grade of D (colorless) whereas diamond B has a lower color grade of K (faint yellow), diamond A will be considered more valuable.