How are Diamonds Cut?

The diamond cut is the step in the production process that turns a rough diamond into an amazing jewel. This is a highly specialized art and requires the precision of an expert. An experienced cutter has the knowledge and tools to cut the diamond of your dreams.

How does this work exactly? Let’s take a look behind the scenes. Before cutting any diamond, the shape is decided.The diamond is the hardest mineral and therefore can only be cut by another diamond. Currently, most cutting tools are partially mechanical, such as discs covered with diamond dust. Lasers, for example, are used for excision and turning or rounded. The entire process is divided into five stages: planning, splitting, grinding, polishing and inspection. It is a time-consuming process, as this will determine the final value of the rough stone.

During the planning phase, it is about finding the optimal way for the rough stone to maximize its characteristics.

A Sarin machine determines the dimensions of the rough stone to show the best cutting options in 3D.

If you want to cut a rough stone in several smaller diamonds, then the rough stone needs to be divided into smaller parts. The diamond is divided with mechanical saws and lasers.

The separated pieces are rounded after the split; this is called turning or rounded. Two rough diamonds are placed in opposite directions of a turning axis. The friction generated between these two diamonds rounds both stones.

At this point, it is already possible to create the facets. The polishing is divided into two stages: roughing and faceting. In the roughing, the stone is left next to the desired proportions. This is a very important step, if not the most important one, as it decides the appearance and brightness of the polished diamond. Finally, the final facets of the stone are carved and polished to obtain smooth and shiny surfaces.

Finally, the polished stone is inspected to ensure compliance with international regulations.

What are the Various Cuts?

The best graphic that describes this is on the home page.

When we talk about the different diamond cuts, we refer to the shape, cut, and transparency that is given to the stone. The sizes determine the degree of refraction of light, its brightness and sparkles, which may depend on whether the model is simple, extolling the purity of the diamond, or more elaborate and eccentric. In Jewelry Juan Manuel you can find all kinds of cuts in engagement rings, always advised by a great team of professionals.

Round cut diamond
This is the classic and traditional cut that most engagement rings share. The most desired percentage is 60%, and perfectionists are between 59% and 61% depth.

Radiant Cut Diamonds
Diamonds with this cut have cut corners and square corners. They are about stones with between 62 and 70 facets. These diamonds have to be used as a central and unique stone in slopes and engagement rings.

Princess Cut Diamonds
This cut is distinguished by having the corners uncut, which gives it a nice sharp and bright shape. These diamonds have 74 facets and a great luminosity for their vertical directions and their facets in the pavilion. It is undoubtedly one of the most desired in engagement rings.

Diamond Cut Emerald or Baguette

This type of cut is distinguished by its rectangular shape and the number of shapes allowed by its outer flat part. They have usually used for baguettes of 2, 3 or 4 diamonds, being able to combine with other precious stones such as emeralds.

Diamond cut heart

Is there a greater symbol of love than a diamond and a heart fused? They have a rounded pavilion and a bearing very similar to the bright and the princess. They usually give each other for Valentine’s Day or anniversaries.

While there are many places you can shop for all of these cuts, we recommend you look at James Allen.  They offer so much more in terms of a better shopping experience, even a 360 degree view of your diamond on a video, prior to purchasing.  Learn more about them on this full review page and you will see why they come highly recommended.

Clark Walker


Clark Walker has been a diamond and rare jewelry savant for as long as he can remember. When retirement commenced and world travel became his new passion, he quickly realized that he needed a stimulating side hobby. Through this website he continues this passion for education, guidance, and keeping tabs on the industry.

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Nathan Carter - April 3, 2019

I found it interested that lasers are used to cut diamonds. My son is working on getting an engagement ring for his girlfriend, and having never been married myself, I am looking into what the process is for diamond cutting. I’ll pass this information to my son so he can decide if he wants a laser cut diamond, or a disc cut diamond.


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