Rough Diamond Evaluation
Once diamonds have left a processing plant, diamond rich concentrate is delivered to manufacturers for cleaning, sorting, and analysis. At this point any additional material attached to the rough diamonds is removed and a rough diamond goes thorough inspection. Each rough diamond is scanned to determine it’s specific dimensions and if it contains any inclusions or imperfections. This part of the process ensures that a rough diamond is cut in a specific shape and proportion in order to allow it to fetch its highest potential value for the manufacturer.
In order for a rough diamonds value to be accurately determined requires the manufacturer to evaluate a stone based on 3 major criteria.
A. Weight Retention
- A 3d model of the diamond, coupled with images of known inclusions is analyzed in order to determine how the diamond can be cut in order to ensure the maximum carat yield.
B. Market Value
- When evaluating the rough stone for weight retention, the manufacturer will also considered how the diamond will sell. While a rough diamond could potentially be cut to yield a higher value, certain shapes may sell better earning a faster return on investment.
B. Color Retention
- A colored diamond can be cut to enhance the value of a stone, however one small mistake or miscalculation has the potential to make a million dollar diamond worth a few thousand.
Once the optimal shape has been determined a rough diamond is sent a gem cutter where the diamond is is transformed from a rough stone to a polished gem.
Read the next article: How Diamonds Are Cut