What makes the cut?

What makes the cut?

When you think of lab-grown diamond jewelry, the first things that come to mind are clarity, cut, color, and carat weight. These four characteristics, known as the four Cs, represent the most essential elements when purchasing a lab-grown diamond.

The cut, in particular, can draw light inside to see those sparkles.

What is diamond cut?

" The cut refers to the dimensions, symmetry and polish of the lab-grown diamond. It is about how well it is designed and crafted to reflect light. "

Cut determines how much light the stone reflects.

What makes a diamond cut good?


When it comes to diamond cuts, the main deciding factors are brightness, fire, and scintillation, all related to face-up appearance. Best-cut lab-grown diamonds will let more light come through the top and sides.


It determines how well the stones are designed to ensure their weight ratio and durability. A good design will ensure you can wear your jewelry for a lifetime.


The quality of craftsmanship can be reflected in its polish and symmetry. In the polishing process, any flaws may disrupt light patterns as it enters and exits the stone. An excellent-cut diamond will also have a symmetrical shape, showing even brightness.

A combination of appearance, design and craftsmanship makes excellent cuts

How to read a cut grade chart?

The cut grade is determined using a set of guidelines called a “Cut Grading Scale". It’s the grading report used by jewelers to evaluate how well a lab-grown diamond has been cut after it has been shaped from rough uncut stone.


It shows an even pattern with good contrast between light and dark areas, so the reflections appear crisp and well-balanced.

Very Good

It has bright areas evenly distributed across the stone’s crown and a few distracting areas.


It isn’t very bright – reflections aren’t as sharp, and there’s more darkness or dullness.

Fair and Poor

It has much more prominent dark areas or dullness.

More about diamond cuts

Apart from the overall cut grades, a few variables provide more insights into the diamond cut. Here are the terms you typically find in a lab-grown diamond grading report.

Porportion Diagram: Understanding how well the diamond facets reflect light


Graphic profile representation of its actual dimensions, the angles, and ratios of its precise cut. Significant components include table, facet, girdle, and culet.


The smoothness of its surface is assessed on a scale ranging from "Excellent" to "Poor."


The exactness of its outline, shape, placement, and alignment of its facets is assessed on a scale ranging from "Excellent" to "Poor."

Shape & Cutting Style

The shape is the outline of a lab-grown diamond, while the cutting style is the pattern of the facet arrangement.

Cut is also assessed from proportions, polish and symmetry.

Difference between diamond cuts and shapes

With all the talk of lab-grown diamonds and their various cuts, there’s a good chance you’ve wondered if there’s a difference between shape and cut. The cut refers to how it reflects light while the shape refers to its overall outline or profile. Lab-grown diamonds come in nine basic shapes, each with its own ideal proportions.

diamond cut