What is the process of removing heavily included sections from gemstone rough by tapping with a small hammer called?

The process of removing heavily included sections from gemstone rough by tapping with a small hammer is known as cobbing. This technique is an essential part of the gemstone extraction and preparation process, where rough stones with visible inclusions or flaws are selectively broken away to improve the overall quality and aesthetics of the finished gem. By carefully tapping the rough, artisans can remove undesirable areas while preserving the stone’s more valuable sections.

Cobbing serves a practical purpose in gemstone processing, as it helps maximize the yield of high-quality material from rough stones. The careful application of force allows gem cutters to control the removal of material more precisely than other methods, which is crucial for maintaining the integrity of the remaining structure of the gem. This makes cobbing a fundamental skill in the trade of gemstone cutting and preparation, particularly when dealing with valuable or delicate stones.