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DIAMOND SELECTION
Understanding the 4C's of Diamonds
If you've been looking into engagement rings, you've probably come across the term "the 4C's". This diamond grading system was developed by GIA in the 1940s, and remains the universal benchmark for determining quality and value of a diamond.
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Cut
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Carat
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Color
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Clarity
While all four characteristics play a role, not every "C" carries equal importance. Understanding how they work together can help you choose a diamond that looks beautiful without paying for qualities that may not be important or even noticeable to the naked eye.
LET'S BREAK IT DOWN
Cut
This is where all the magic happens!
The cut is the math of your stone, and it refers to the physical symmetry, internal faceting and polish of a diamond. It is the most important of the 4 C's and determines the light return, brilliance, and overall beauty of your diamond.
Light Interaction
When a diamond is cut properly, light enters the stone through the top facet, bounces around the interior, and is reflected back up the eye, creating the brilliance diamonds are known for. If a diamond is cut too shallow or too deep, light can escape through the sides or bottom, making the stone appear less lively.
Since cut has the greatest impact on a diamond's overall appearance, it's often considered the most important of the 4C's.
Understanding the Terminology
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Symmetry: The alignment, angles and precision of the faceting system.
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Polish: The overall condition of a diamond’s surface finish.
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Brightness: Internal & external reflection of white light.
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Fire: Flashes of rainbow colors you see when a diamond disperses white light into spectral colors.
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Scintillation: Pattern of bright & dark flashes within the diamond.
TLDR; Brilliance is the white sparkle, fire is the rainbow sparkle & scintillation is the flashing you see when the diamond moves.
Carat
This is the unit of measuring a diamond's weight. Carat weight is a consistent indicator of how large a diamond will look, but depending on how the stone is cut, actual measurements will vary.
Looks can be deceiving
"Magic Numbers"
Carat weight measures a diamond's mass, not its visible size. Two diamonds with the same carat weight can face up differently depending on their shape, proportions, and cut quality.
In many cases, a well-cut diamond can look larger and more brilliant than a poorly cut diamond with a slightly higher carat weight. Always keep an eye on the millimeter sizes instead of carat weight alone.
Certain carat weights—such as 0.50 ct, 1.00 ct, 1.50 ct, and 2.00 ct—are considered "magic numbers" simply because these sizes are popular among diamond shoppers. Like anything else, as demand increases, prices often jump disproportionately.
Choosing a diamond just below one of these benchmarks will give you better value while maintaining the same appearance.
Color
When describing diamond color, we are actually talking about the absence of color.
Color is the overall temperature or tone of your diamond, and is graded on a scale from
D to Z; with D being absolutely void of color (like an iceberg-white). As the grade
moves further down the scale, the diamond will gradually become warmer in tone.
What causes diamond color?
Most diamond color comes from trace element exposure during formation. The most common is nitrogen, which creates faint warm tones.
Fancy color diamonds show a noticeable and appealing color, and go through a different grading process. Color is a result of higher levels of nitrogen (yellow diamonds), boron (blue diamonds), exposure to radiation (green/pink diamonds), and/or rare structural variations in the crystal lattice (common in pink diamonds). These variables affect how the diamond absorbs and reflects light, resulting in its unique color.
Considerations
Lighting, diamond shape, and metal choice all influence how a diamond appears in real life. Yellow or rose gold settings can help mask warmth in near-colorless diamonds, while platinum or white gold settings tend to make subtle color more noticeable.
That said, color grading is very gradual, and differences between grades can be hard to notice once set.
Most clients stay within the D–G color range for a bright, colorless appearance in any metal. Near-colorless grades (G–J) may show a very subtle warmth and a softer, slightly vintage look, which often feels harmonious in yellow gold settings.
Clarity
Clarity refers to the inclusions found within a diamond & surface imperfections known as blemishes. These characteristics occur naturally during crystal formation, even in lab-grown diamonds. Inclusions aren't inherently bad; in fact, many are invisible to the naked eye. The key is ensuring they don't interfere with light performance or cluster together in a noticeable way.
Eye-Clean
When reviewing diamond options, you'll receive 30x magnified videos of each stone to look over its faceting, overall appearance, and clarity characteristics. Most diamonds contain inclusions of some kind, and magnification can make even minor characteristics appear much more significant than they actually are.
It's important to remember that these videos are highly zoomed in, and in person most diamonds graded above VS2 (and sometimes SI1) and above will be eye-clean.
Not all inclusions are created equal
While most individual inclusions have little to no impact on a diamond’s overall appearance and strength, certain surface-reaching inclusions (such as naturals and indented naturals) can raise some durability concerns.
Depending on their size and location, these inclusions can create areas of vulnerability within the stone, especially when positioned near the outer edge. While we generally avoid these characteristics, there are some exceptions if the placement is right and the stone is otherwise a great fit.
Frequently asked questions
Stone Sourcing
Stone Viewing Service
Visual References
CLARITY
COLOR
CUT
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