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How Are Diamonds Shaped?

Diamond shape refers to the outline shape of the diamond when looking from the top down, which can be shaped into a variety of fancy shapes such as round, oval, princess, pear, emerald, radiant, cushion, heart, etc. In order to create these shapes, a diamond goes through the process known as diamond cutting.





Diamond cutting is the process of transforming a rough stone diamond into a beautiful gemstone. The process is highly detail-oriented and must be undertaken by experienced professionals with specialty tools as just one small error can significantly affect the outcome of the diamond.


So, what are the main considerations that the experts need to be concerned about before they start shaping and what are the steps needed to create a perfect proportioned diamond? In this article we will discuss the process in detail:


Diamond Cutting & Polishing Process


Diamonds cuts diamonds is not just an idiom. Since diamonds are the hardest substance in the world, only a diamond can be used to cut another diamond. Another alternative is laser cutting however, their uses are often limited as it is only used during cleaving and bruting stages.





The diamond cutting and polishing process can be broken down into 5 simple steps as followed;


Step 1: Planning


In order to get the most out of a diamond and minimise waste as much as possible, it is significantly important to plan out and measure the proportion of the diamond accurately before moving on to the next stage. With modern day technology, we are now able to generate exact measurements of a stone from computer software, which makes it easier for the cutter to plan out the cutting process and determine the final outcome of the diamond.


Step 2: Cleaving


The cleaving step is where a rough diamond is cut into two manageable sizes so it is easier for the cutter to shape them. The tools that are commonly used in this step are either a copper disc embedded with diamond dust or alternatives like a cutting laser. Moreover, it is important for a cutter to cleave it along the diamond’s tetrahedral plane which is its weakest point. If the wrong spot is cleaved, it may result in the diamond shattering. In most cases, a diamond is placed on a wax or cement mould in order to hold it in place whilst the cutter cleaves a stone along the plane. A steel blade is then placed in the groove to split the stone into two.


Step 3: Bruting


After the diamond is split into two, the next step is bruting. Bruting is the process in which the girdle is shaped by another diamond to make them round. During this process, if it is done by hand, it is called bruting, on the other hand, if it is done by machine, it is called cutting. Whether it is shaped by hand or by machine, diamond is used to cut diamond to create a rough girdle finish. This step is done to prepare for the polishing process.


Step 4: Polishing


In order to create the perfect fine jewellery finish, the cutter needs to form the facets of the diamond, typically with a polishing wheel. First, the cutter places the diamond on the rotating arm and uses a polishing or spinning wheel to create the smooth, equal facets of the diamond. The diamond goes through the two processes in creating the basic symmetry called blocking and brillianteering.


In the blocking process, the diamond is shaped into 8 pavilion mains, 8 crowns, 1 culet, and 1 table facet. The diamond then moves to the next process, known as brillianteering, which is where the diamond is completed by adding the remaining facets. The finish look includes all 57 facets.


Step 5: Quality control


Last but not least, quality control. After the diamond is cleaved, bruted, and polished, the quality control team will take action. The diamond will be checked to ensure that they all meet the standards and qualifications of the manufacturer. In some cases, the stone will be sent back to the cutter for further touch ups if required.


Overall, as the process is highly detail-oriented, the tasks of the designer and cutter have a big impact on the result of your fine jewellery, especially if you are wanting bespoke jewellery. We are fully aware of how much it means to our clients when they want to bring home the finest custom jewellery, whether it be for themselves or a gift for a loved one. That is why here at Infiniti Jewels, we offer the best diamond jewellery in Singapore from our leading Singapore jewellery designers. Cut, color, clarity and carat - a lot goes into selecting the perfect gemstone. Whether it is a 3 stone diamond engagement ring, emerald or pink gemstone ring, contact us today to discover more of our exclusive range of diamond and gemstone jewellery available in various shapes, sizes and styles.


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