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What do you see in your mind when you think of a diamond? If you’re like most of us, you think of a gem that’s perfect in every way — right down to its signature shape. What you probably don’t realize, however, is that diamonds aren’t perfect when they’re plucked from the mines. These rough diamonds are then cut into the styles we know and love.
Diamonds are graded based on the 4 Cs — including cut — but the actual step-by-step process of how its done is pretty much a mystery to most of us. How are diamonds cut exactly? Let’s break it down.
Fun fact: Diamonds can only be cut with diamonds. The reason? Diamonds are some of the hardest materials on earth, so the tools they use to do it are usually diamond bladed on the edges or have an edge of diamond dust.
But before they’re cut, a master diamond cutter evaluates the stone for its inclusions — AKA flaws — and carat weight. From there, the cutter then determines whether it’s shaped using a step cut or a brilliant cut.
Most of the time, a rough diamond is in a octahedron shape, meaning it has eight faces, twelve edges and six vertices. In plain English: It’s the perfect shape for a brilliant cut because it won’t lose too much carat weight in the process — and it’ll shine brightly in the light.
A step cut is typically done on a diamond to create a square or rectangular shape that features eight lines running parallel along both the length and width of the diamond, drawing the eye to the center of the stone and give the illusion that it has “steps,” hence the name. While step cut diamonds don’t shine as brightly as brilliant cut diamonds, they are typically clearer.
So, how are diamonds cut? It’s a complicated process that’s typically broken down into five steps by a qualified diamond expert: planning, cleaving, bruting, polishing and inspecting.
Once a diamond is cut, it’s then sent to gem experts to receive a grade based on its 4 Cs — including the cut.
While you can buy diamonds without a grade, it’s not the best choice. At With Clarity, every diamond we sell comes with a GIA grading report or an IGI grading report so you’ll know everything about your diamond — and you can ensure you have what you paid for. Shop with confidence and with clarity.