Cut is all about the SPARKLE factoR
What is Diamond Cut?
Cut refers to how well a diamond’s facets are proportioned, shaped, and polished to reflect light. It determines how much brilliance, fire, and scintillation the diamond exhibits. A well-cut diamond sparkles more, making it appear more brilliant and larger than its actual size.
What is the Cutting Process?
Jewelers cut unpolished mined and grown diamonds into different shapes and polished. Then an independent gemological laboratory will grade the diamonds on a scale from Excellent to Poor.
While shape and cut are often used interchangeably, shape refers to the silhouette of a diamond.
If you’re looking at Round Brilliant stones, you can reference the cut grade on the diamond certificate. There are strict standards for this shape, so you can be sure you know exactly what you’re getting. With any shape other than the brilliant round, check to see if there is a cut grade on the diamond certificate.
What Affects the Cut of a Diamond?
Proportions
The relationship between the size, angles, and depth of the diamond are represented in ratios. A diamond with poor proportions (too deep or too shallow) won’t reflect light and appear dull or smaller than it is. Ideal proportions allow light to enter the diamond and reflect, maximizing sparkle. The two main attributes of diamond proportion are:
Depth
The height of the diamond from the culet (bottom) to the table (top).
Table Percentage
The width of the top facet relative to the diamond’s diameter.
Symmetry
How precisely the diamond’s facets align and mirror each other will determine its brilliance. Poor symmetry can cause uneven light reflection, reducing brilliance. While properly aligned facets reflect light evenly, making the diamond sparkle more.
Polish
How smooth the diamond’s surface finish is after it’s cut also determine its sparkle. Poor polishing leaves tiny marks or scratches that can dull the diamond’s sparkle.
High-quality polish ensures smooth, flawless facets that enhance light performance.
Note: Insert NEW cut image from the diamond product page here
Adequate quality cut which reflects some light while maximizing weight. While not as brilliant as a good cut, still a quality diamond.
How is Cut Graded?
Diamond cut is graded on a scale ranging from Excellent to Poor. Here’s a breakdown of each cut grade:
| Grade | Description |
|---|---|
| Excellent/Ideal | Maximum sparkle and brilliance |
| Very Good | Great sparkle, but slightly less than ideal at a lower price point |
| Good | Adequate brilliance, but less lively |
| Fair | Noticeable loss of sparkle, not ideal for engagement rings |
| Poor | Minimal brilliance and often appearing dull, not suitable for engagement rings |
Note that SAMA only offers diamonds with cut grade ‘Good’ and above because anything below “Good” will look dull and a little lifeless.
How Do You Choose a Diamond Based on Cut?
Prioritize Excellent or Ideal Cut Grades
Choose a diamond with a GIA or IGI “Excellent” cut grade for maximum brilliance. These grades reflect the most light, making the diamond sparkle and appear more vibrant.
Avoid Deep or Shallow Cuts
Deep Cut: Light escapes through the sides, making the diamond look smaller and darker.
Shallow Cut: Light leaks through the bottom, reducing brilliance.
Ideal Depth & Table Proportions
Round Diamonds: Depth 59-62%, Table 53-58%
Fancy Shapes: Proportions vary by shape (check specific guidelines for ovals, princess, and other shapes).
Check Symmetry and Polish
Look for diamonds with “Excellent” or “Very Good” symmetry and polish to ensure facets are aligned and the surface is smooth. Poor symmetry or polish can cause uneven light reflection, dulling the diamond’s brilliance.
Consider Round Brilliant for Maximum Sparkle Round brilliant cuts are designed for optimal light reflection and deliver the most sparkle. If choosing a fancy shape (oval, princess, cushion), prioritize cut quality to maintain brilliance.
Review GIA or IGI Certification Always choose a diamond certified by GIA or IGI to ensure accurate cut grading. Certification reports provide detailed information on proportions, symmetry, and polish.
Go for Hearts and Arrows for Extra Precision Consider a Hearts and Arrows diamond, which reflects near-perfect symmetry for unmatched sparkle.
Pro Tip: Cut is the most important factor affecting a diamond’s beauty. Always opt for the best cut within your budget (even if it means compromising slightly on color or clarity), as a superior cut can make a diamond appear larger, brighter, and more captivating! If Excellent is beyond your means, a ‘Very Good’ cut grade offers superior radiance and brilliance while giving you massive savings
