In rough diamonds, which factor is NOT a primary focus of valuation?

• A. Cut quality
• B. Carat weight
• C. Crystal quality
• D. Rough color

Answer: (A)

In rough diamonds, valuation focuses on properties that will carry through to the finished gemstone and affect how much value can be realized after cutting. Carat weight is a primary factor because size drives value in most markets. Rough color is also important, since the color potential of the rough sets limits on the final hue and market appeal of the polished stone. Crystal quality, meaning the crystal’s clarity and internal features or inclusions, matters because it influences both the yield of usable material and the value of the eventual cut gem. Cut quality, however, describes how well a finished diamond will perform in light and symmetry after it’s cut, which can only be judged once the stone has been shaped. That’s why cut quality is not a primary factor in valuing rough diamonds.