Polishing (Cut) Process

To achieve the perfect cut, a process known as polishing is carried out. To discover more about this procedure, take a look at the six steps that are followed below.

 

 

1) Marking - Firstly, the stone needs to be marked. The rough diamond will be evaluated in full to decipher how it should be cut so that full value is extracted. An important part of this step involves assessing any inclusions.

 

2) Cleaving - Next we have cleaving, which is an optional step. Nevertheless, when it comes to large stones, most will go through this process. Cleaving needs to be done by an expert with a considerable amount of care, as errors can result in the diamond being shattered. This process involves a cutting tool being used to achieve a groove along the line. Once the area has been prepared, and it is evident where the stone is to be cleaved, the cleaver will be mounted and a steel wedge will go into the groove. The expert then strikes the wedge with a mallet so that the diamond splits along the line.

 

3) Sawing - After this, we have sawing. In diamond cutting, specialist saws are used, and they can rotate at roughly four thousand revolutions a minute. Because of this, sawing through a one-carat diamond can take as long as eight hours. If a knot gets in the way, you can expect it to take even longer. A lot of businesses nowadays are acquiring laser equipment to cut diamonds instead of using the former approach. This is because it is way more precise and efficient. 

 

4) Rounding - This step can also be referred to as girdling or bruiting. It has the purpose of rounding the diamond into a cone shape. To do this, the stone will be placed into the lathe, after which another diamond will be mounted onto the end of a lengthy handle and placed against the diamond while it spins.

 

5) Faceting - Faceting consists of two parts. The main 18 facets are placed first. The second part involves adding the remaining 40 facets. This applies to Round Brilliant diamonds.

 

6) Finishing touches - Last but not least, the diamond will go through its finishing touches, which involves careful inspection, and the removal of all oil and dust. To do this, the diamond will be boiled in hydrochloric and sulphuric acids.