What is the result of cobbing a gemstone?

Cobbing a gemstone involves the process of selectively removing lower quality sections from the rough stone. This technique is employed to enhance the overall quality of the resulting gem. By eliminating inclusions, flaws, or areas that do not meet the desired quality standards, the gem cutter can maximize the value and appearance of the finished product.

This process is critical in the gemstone industry, as it not only improves the visual appeal of the stone but also increases its market value. Cobbing allows for the selection of the best parts of the rough material, presenting a stone that has better clarity, brilliance, and overall aesthetic appeal.

Other options do not accurately describe cobbing. For instance, cobbing does not guarantee a smooth finish, as that is typically part of a different stage after cutting. While it may indirectly affect color distribution by removing poor-quality sections, the primary focus of cobbing is on enhancing quality rather than achieving uniformity in color. Lastly, cobbing does not change the chemical properties of the gemstone; it rather centers on physical alterations to improve appearance and quality.