At its heart, a diamond’s cut defines its relationship with light. Every angle, facet, and polished surface dictates how effortlessly a stone captures an ambient room and transforms it into an exquisite display of fire and brilliance.
This definitive Revera Jewels Cut Guide is designed to take you behind the glass. From the precision engineering that unlocks a stone’s maximum sparkle to the rigorous scientific grading scales used to measure it, you will discover exactly how master craftsmanship elevates a raw gemstone into a breathtaking lifelong heirloom.
The cut of a diamond is arguably the most crucial of the 4 Cs (Cut, Color, Clarity, and Carat). While nature dictates a diamond's clarity and color, its cut is entirely in the hands of a master craftsman. It is the cut that unlocks a diamond’s true beauty, transforming a rough stone into a breathtaking masterpiece of light and fire.
The cut of a diamond is arguably the most crucial of the 4 Cs (Cut, Color, Clarity, and Carat). While nature dictates a diamond's clarity and color, its cut is entirely in the hands of a master craftsman. It is the cut that unlocks a diamond’s true beauty, transforming a rough stone into a breathtaking masterpiece of light and fire.
Diamonds are cut using specialized tools to facet and polish the stone, creating brilliance and symmetry. Because cut has such a direct impact on a diamond’s appearance, grading systems were developed to consistently evaluate cut quality.
These grading systems assess three key factors: appearance (brilliance, fire, scintillation), design (proportions), and craftsmanship (polish and symmetry). While the criteria are similar, most independent institutes use their own terminology to grade the overall cut of a diamond.
At Brilliant Earth, we also use specific scale language to help our customers understand the subtle differences in cut that affect price and quality. We base our scale on the cut specifications provided by the certifying gemological laboratory and grade diamonds from Super Ideal to Ideal, Very Good, Good, Fair, and Poor. This means that, for example, a GIA-certified diamond with an Excellent cut grade will be listed as a Super Ideal or Ideal diamond on the Brilliant Earth site.
Diamonds are cut using specialized tools to facet and polish the stone, creating brilliance and symmetry. Because cut has such a direct impact on a diamond’s appearance, grading systems were developed to consistently evaluate cut quality.
These grading systems assess three key factors: appearance (brilliance, fire, scintillation), design (proportions), and craftsmanship (polish and symmetry). While the criteria are similar, most independent institutes use their own terminology to grade the overall cut of a diamond.
At Brilliant Earth, we also use specific scale language to help our customers understand the subtle differences in cut that affect price and quality. We base our scale on the cut specifications provided by the certifying gemological laboratory and grade diamonds from Super Ideal to Ideal, Very Good, Good, Fair, and Poor. This means that, for example, a GIA-certified diamond with an Excellent cut grade will be listed as a Super Ideal or Ideal diamond on the Brilliant Earth site.
When grading a diamond's cut, gemological laboratories like the GIA (Gemological Institute of America) don't just look at the stone's depth or width. They evaluate a complex interplay of physical proportions and craftsmanship.
At Revera Jewels, we break these down into two main categories: Proportional Factors (how the diamond is shaped to handle light) and Craftsmanship Factors (the care taken during the cutting process).
Proportions are the relative measurements of the diamond's facets and angles. Even a fraction of a millimeter can completely change how light behaves inside the stone.
Once the ideal proportions are mapped out, the master cutter must execute the design with flawless physical execution. This is evaluated through two main metrics on a grading report:
Symmetry refers to how precisely the diamond’s facets align and intersect with one another.
Polish is the smoothness of the diamond's exterior surface facets after the cutting process is complete.
Every factor listed above works in unison. A slight deviation in the pavilion angle can sometimes be compensated for by a tighter crown angle, which is why diamond cut grading requires highly advanced optical scanning technology.
At Revera Jewels, we meticulously vet our inventory to ensure that the proportions, symmetry, and polish work together flawlessly, delivering a diamond that maximizes light performance and commands attention from every angle.
When grading a diamond's cut, gemological laboratories like the GIA (Gemological Institute of America) don't just look at the stone's depth or width. They evaluate a complex interplay of physical proportions and craftsmanship.
At Revera Jewels, we break these down into two main categories: Proportional Factors (how the diamond is shaped to handle light) and Craftsmanship Factors (the care taken during the cutting process).
Proportions are the relative measurements of the diamond's facets and angles. Even a fraction of a millimeter can completely change how light behaves inside the stone.
Once the ideal proportions are mapped out, the master cutter must execute the design with flawless physical execution. This is evaluated through two main metrics on a grading report:
Symmetry refers to how precisely the diamond’s facets align and intersect with one another.
Polish is the smoothness of the diamond's exterior surface facets after the cutting process is complete.
Every factor listed above works in unison. A slight deviation in the pavilion angle can sometimes be compensated for by a tighter crown angle, which is why diamond cut grading requires highly advanced optical scanning technology.
At Revera Jewels, we meticulously vet our inventory to ensure that the proportions, symmetry, and polish work together flawlessly, delivering a diamond that maximizes light performance and commands attention from every angle.
The pinnacle of diamond engineering. A Super Ideal cut diamond represents the absolute rarest tier of craftsmanship, where its proportions, polish, and symmetry have all earned the highest possible rating (frequently referred to in gemology as "Triple Excellent"). These masterfully crafted stones possess zero light leakage, delivering unparalleled, breathtaking sparkle that commands attention across any room.
An Ideal cut diamond features proportions engineered carefully within the optimal range for maximum light return. While its polish and symmetry may sit just one micro-step below absolute perfection, an Ideal diamond is visually stunning. To the untrained eye, it offers nearly identical, head-turning radiance as a Super Ideal stone, making it a highly intelligent choice.
Diamonds with a Very Good cut grade have proportions that fall just slightly outside the strict ideal parameters. Their polish and symmetry range from top-tier to moderate. These stones still capture and refract light beautifully, offering a wonderful, eye-catching scintillation at a highly accessible investment level.
A Good cut diamond possesses minor proportional deviations, meaning it will still catch the light and display authentic diamond brilliance, but with noticeably less intensity than our top tiers. Because of the slightly imperfect ratios, more dark areas appear within the stone, making it look a bit more muted.
Fair cut diamonds experience a notable loss of light performance. Due to misaligned facets or proportions that are too deep or shallow, light easily escapes through the sides or bottom of the stone. This creates prominent dull zones or gray shadows beneath the main table, resulting in a significantly subdued sparkle.
Poor cut diamonds are heavily misproportioned, causing light to completely spill out of the pavilion or culet rather than bouncing back to your eye. They appear dark, lifeless, and visually smaller than their actual weight.
If your goal is a diamond that dances with light even in low-lit rooms, we highly recommend staying within our Super Ideal and Ideal cut collections. If you are looking to maximize your budget for a larger carat weight while maintaining a beautiful shine, the Very Good tier serves as a fantastic sweet spot.
The pinnacle of diamond engineering. A Super Ideal cut diamond represents the absolute rarest tier of craftsmanship, where its proportions, polish, and symmetry have all earned the highest possible rating (frequently referred to in gemology as "Triple Excellent"). These masterfully crafted stones possess zero light leakage, delivering unparalleled, breathtaking sparkle that commands attention across any room.
An Ideal cut diamond features proportions engineered carefully within the optimal range for maximum light return. While its polish and symmetry may sit just one micro-step below absolute perfection, an Ideal diamond is visually stunning. To the untrained eye, it offers nearly identical, head-turning radiance as a Super Ideal stone, making it a highly intelligent choice.
Diamonds with a Very Good cut grade have proportions that fall just slightly outside the strict ideal parameters. Their polish and symmetry range from top-tier to moderate. These stones still capture and refract light beautifully, offering a wonderful, eye-catching scintillation at a highly accessible investment level.
A Good cut diamond possesses minor proportional deviations, meaning it will still catch the light and display authentic diamond brilliance, but with noticeably less intensity than our top tiers. Because of the slightly imperfect ratios, more dark areas appear within the stone, making it look a bit more muted.
Fair cut diamonds experience a notable loss of light performance. Due to misaligned facets or proportions that are too deep or shallow, light easily escapes through the sides or bottom of the stone. This creates prominent dull zones or gray shadows beneath the main table, resulting in a significantly subdued sparkle.
Poor cut diamonds are heavily misproportioned, causing light to completely spill out of the pavilion or culet rather than bouncing back to your eye. They appear dark, lifeless, and visually smaller than their actual weight.
If your goal is a diamond that dances with light even in low-lit rooms, we highly recommend staying within our Super Ideal and Ideal cut collections. If you are looking to maximize your budget for a larger carat weight while maintaining a beautiful shine, the Very Good tier serves as a fantastic sweet spot.

