What clarity characteristic can be a sign of efficient cutting?

• A. A feather pattern.
• B. A natural.
• C. A heavy blemish.
• D. A crystal cluster.

Answer: (B)

Leaving a natural on the finished diamond can be a sign of efficient cutting because it shows the cutter preserved more of the original crystal instead of removing extra material to eliminate surface features. By not grinding away every natural surface, weight is retained and overall yield improves, which is a hallmark of careful, efficient use of the rough.

The other options describe features that typically indicate additional material removal or potential durability issues. A feather pattern is an internal fracture line that often prompts more cautious cutting or avoidance of wasting weight on trying to hide it. A heavy blemish is a surface imperfection that would usually require removing surrounding material to improve clarity and appearance, reducing efficiency. A crystal cluster is an inclusion that affects clarity and would generally drive decisions to cut differently or remove more stone rather than signaling efficient cutting.