Diamonds are the hardest stone on earth! Sitting at a 10 on Moh's hardness scale, they're the king of gemstone hardness. The only stone that will cut a diamond is another diamond.

  • That's why the old wives' tale persists that one can test a diamond and determine that it's genuine by cutting glass with it.
  • But that's a bad idea. Lots of diamond simulants and lab-grown stones are harder than glass.

In 2021, we use high-powered modern lasers and diamond-coated tools to cut and shape diamonds for jewelry. Today, the team at Gold and Diamond Source is here to walk you through that process. 

The Diamond Cutting Process

Inspect The Diamond

The diamond cutting process begins with an inspection of the diamond "rough." Rough diamonds aren't much to behold. They look like glass pebbles. 

  • Only a qualified lapidary — a professional stonecutter — can look at a rough diamond and know where the first cuts need to be made to turn that pebble into a sparkling treasure.
  • The diamond cutting process is incredibly delicate! 
  • The slightest error in cutting alters how light travels in the stone and back to our eyes and dramatically affects that diamond's price.

3D Model The Diamond

Once a stone is inspected for inclusions that need to be cut off, the lapidary inputs data into software to generate 3D models of the cutter's options. All this planning ensures that the final diamond is perfectly symmetrical — and, therefore, high quality.

Cleaving & Bruting

Next, stone cutters can split a large piece of rough into several workable stones. This process is called cleaving. Then, the stone cutter will work two diamonds against each other in a process called bruting.

Bruting Diamonds

Also called "girdling," two diamond roughs are worked next to each other on a spinning axle. This creates a "rough girdle finish," and the final diamond begins to take shape.

Finally, the stonecutter will use diamond-encrusted tools to shape and polish the stone. Each facet needs to be perfect, and some diamond cuts are more involved than others. Consider, for instance, that a brilliant round cut diamond — the most popular choice for engagement rings and stud earrings right now — requires 58 perfect facets!

Inspect The Finished Diamond

At last, every diamond is inspected and graded based on its cut, clarity, color and carat weight. It's finally ready to be set into a stunning piece of jewelry and admired for generations.

And that's where the diamond experts at Gold and Diamond Source come in. Our mission is to help customers discover the perfect gem. Whether you're looking for an engagement ring or a fashion diamond piece, we're here to help. So check out our website for more great diamond resources, and contact us today.