Everything you need to know about diamond size and carat weight.
Lab Diamonds, Style Guide, Buying Guide, Shapes, Certification, Comparisons
Diamond cut refers to the precision used to shape and polish a diamond. Unlike the other 4Cs, cut is determined entirely by human craftsmanship.
Diamond cut does not refer to shape. Shapes such as round, oval, emerald, or pear describe the outline of the diamond, while cut refers to how well the diamond’s facets interact with light.
Cut has the greatest influence on a diamond's overall beauty.
Even a diamond with excellent color and clarity can appear dull if it is poorly cut. A well-cut diamond maximizes brightness, sparkle, and balance.
At Ada Diamonds, every diamond is inspected in person to ensure it meets our standards for light performance and overall beauty.
Gemological laboratories assign cut grades to evaluate how well a diamond reflects light. The standard cut scale includes five grades:
Ideal
Excellent
Very Good
Fair
Poor
Only round brilliant diamonds receive a standardized cut grade from major laboratories such as GIA or IGI. Fancy shapes such as oval, emerald, or pear do not receive an official cut grade.
At Ada Diamonds, we only offer round diamonds with Excellent or Ideal cut grades, ensuring exceptional light performance.
A diamond’s signature sparkle and beauty come from the way it interacts with light.
Diamonds have an extremely high refractive index, meaning light slows down when it enters the diamond and reflects between its internal facets before returning to the viewer’s eye.
When a diamond is cut with the proper proportions and symmetry, most of the light entering the stone is reflected back through the top of the diamond, creating its characteristic brilliance.
Poorly cut diamonds allow light to escape from the bottom or sides, which can make the stone appear darker or less lively.
Fancy-shaped diamonds such as ovals, pears, emeralds, and radiants do not receive standardized cut grades. Instead, experts evaluate the “make” of the diamond, which describes how the stone looks in person.
A grading report may include measurements such as pavilion depth, symmetry, and polish that help indicate how the diamond was cut, but these details do not always reveal how a diamond looks in real life.
Characteristics such as bow ties, paneling, and light leakage can significantly influence the appearance of a fancy-shaped diamond and are often only noticeable in person.
For this reason, fancy-shaped diamonds should never be purchased sight unseen, and having a lab diamond expert inspect the stone before purchase is the best way to ensure a beautiful make.
Gemologists describe cut using four visual characteristics that influence how a diamond interacts with light: brightness, fire, scintillation, and pattern.
Brightness refers to how much white light is reflected back to the viewer when looking at a diamond.
Fire describes the rainbow flashes of color produced when light disperses within the diamond. Because diamonds have an extremely high level of light dispersion, white light entering the stone separates into individual colors in a prism-like effect.
Scintillation refers to the flashes of light you see as a diamond moves. As the diamond shifts, its facets reflect light in a series of bright flashes. This is commonly referred to as a diamond’s sparkle.
Pattern describes the contrast of light and dark areas created by the diamond’s facet arrangement. Well-cut diamonds display crisp, evenly balanced patterns of contrast, while diamonds with poor proportions may show uneven or blurry gray areas instead. The better the cut of the diamond, the better the contrast is between dark areas and light areas.
Some round diamonds exhibit an especially precise pattern known as hearts and arrows. These diamonds display near-perfect optical symmetry and may receive a hearts and arrows designation from laboratories such as IGI or GCAL.
Everything you need to know about diamond size and carat weight.
Lab Diamonds, Style Guide, Buying Guide, Shapes, Certification, Comparisons
Diamond cut refers to the precision used to shape and polish a diamond. Unlike the other 4Cs, cut is determined entirely by human craftsmanship.
Diamond cut does not refer to shape. Shapes such as round, oval, emerald, or pear describe the outline of the diamond, while cut refers to how well the diamond’s facets interact with light.
Cut has the greatest influence on a diamond's overall beauty.
Even a diamond with excellent color and clarity can appear dull if it is poorly cut. A well-cut diamond maximizes brightness, sparkle, and balance.
At Ada Diamonds, every diamond is inspected in person to ensure it meets our standards for light performance and overall beauty.
Gemological laboratories assign cut grades to evaluate how well a diamond reflects light. The standard cut scale includes five grades:
Ideal
Excellent
Very Good
Fair
Poor
Only round brilliant diamonds receive a standardized cut grade from major laboratories such as GIA or IGI. Fancy shapes such as oval, emerald, or pear do not receive an official cut grade.
At Ada Diamonds, we only offer round diamonds with Excellent or Ideal cut grades, ensuring exceptional light performance.
A diamond’s signature sparkle and beauty come from the way it interacts with light.
Diamonds have an extremely high refractive index, meaning light slows down when it enters the diamond and reflects between its internal facets before returning to the viewer’s eye.
When a diamond is cut with the proper proportions and symmetry, most of the light entering the stone is reflected back through the top of the diamond, creating its characteristic brilliance.
Poorly cut diamonds allow light to escape from the bottom or sides, which can make the stone appear darker or less lively.
Fancy-shaped diamonds such as ovals, pears, emeralds, and radiants do not receive standardized cut grades. Instead, experts evaluate the “make” of the diamond, which describes how the stone looks in person.
A grading report may include measurements such as pavilion depth, symmetry, and polish that help indicate how the diamond was cut, but these details do not always reveal how a diamond looks in real life.
Characteristics such as bow ties, paneling, and light leakage can significantly influence the appearance of a fancy-shaped diamond and are often only noticeable in person.
For this reason, fancy-shaped diamonds should never be purchased sight unseen, and having a lab diamond expert inspect the stone before purchase is the best way to ensure a beautiful make.
Gemologists describe cut using four visual characteristics that influence how a diamond interacts with light: brightness, fire, scintillation, and pattern.
Brightness refers to how much white light is reflected back to the viewer when looking at a diamond.
Fire describes the rainbow flashes of color produced when light disperses within the diamond. Because diamonds have an extremely high level of light dispersion, white light entering the stone separates into individual colors in a prism-like effect.
Scintillation refers to the flashes of light you see as a diamond moves. As the diamond shifts, its facets reflect light in a series of bright flashes. This is commonly referred to as a diamond’s sparkle.
Pattern describes the contrast of light and dark areas created by the diamond’s facet arrangement. Well-cut diamonds display crisp, evenly balanced patterns of contrast, while diamonds with poor proportions may show uneven or blurry gray areas instead. The better the cut of the diamond, the better the contrast is between dark areas and light areas.
Some round diamonds exhibit an especially precise pattern known as hearts and arrows. These diamonds display near-perfect optical symmetry and may receive a hearts and arrows designation from laboratories such as IGI or GCAL.
