Diamonds are renowned for their ability to transmit light and sparkle so intensely. We often think of a diamond’s cut as shape (round, heart, oval, marquise, pear), but what diamond cut actually does mean how well a diamond’s facets interact with light. Precise artistry and workmanship are required to fashion a stone so its proportions, symmetry and polish deliver the magnificent return of light only possible in a diamond.

Achieving the best cut for a diamond reflects in the stone’s final beauty and value. And of all the diamond 4Cs, it is the most complex and technically difficult to analyze. To determine the cut grade of the standard round brilliant diamond – the shape that dominates the majority of diamond jewelry – GIA calculates the proportions of those facets that influence the diamond’s face-up appearance. These proportions allow GIA to evaluate what the best cut for a diamond is, by studying how successfully a diamond interacts with light to create desirable visual effects, such as:

  • Brightness: Internal and external white light reflected from a diamond
  • Fire: The scattering of white light into all the colors of the rainbow
  • Scintillation: The amount of sparkle a diamond produces, and the pattern of light and dark areas caused by reflections within the diamond

GIA’s diamond cut grade also takes into account the design and craftsmanship of the diamond, including its weight relative to its diameter, its girdle thickness (which affects its durability), the symmetry of its facet arrangement, and the quality of polish on those facets.

How does pavilion depth affect a diamond’s cut?

The distance from the bottom of the girdle to the culet is the pavilion depth. A pavilion depth that’s too shallow or too deep will allow light to escape from the side of the stone or leak out of the bottom. A well-cut diamond will direct more light through the crown.

The GIA Diamond Cut Scale for standard round brilliant diamonds in the D-to-Z diamond color range contains 5 grades ranging from Excellent to Poor and is the definitive scale for classifying diamond cuts.

Joseph G.
THE BEST! This is the third time I’ve purchased / done business with David Stern and first time writing a review and we couldn’t be happier. Thank you guys for all you do. My wife picked out a... beautiful push present and had it custom ordered to her liking. I brought in a family heirloom broken ring to be fitted and fixed and cleaned and David’s top priority was my 100% satisfaction and he delivered. Pricing is super competitive and up-front, no surprises later. The New Years sale was really a blessing to us. 3 for 3 positive experiences. Thanks again!read more
A wonderful experience!David Stern sets the bar high for buying estate jewelry as well as selling his beautiful designs. His willingness to explain all aspects of the process of purchasing jewelry... with complete transparency, his beautiful store, not to mention David’s impeccable sense of style all contribute to a comfortable, safe environment where one knows they will be treated fairly and courteously. We were so impressed that not only did we sell the jewelry we had, we also arranged for a new David Stern designed necklace to be made for us right away.If you’re selling jewelry, don’t waste time seeing anyone else. If you’re buying, pay him a visit. You won’t be disappointed!read more
Consumer A.
So far I have come across only two fair places in Boca to sell your jewelry. One estate buyer and here. The difference is David is a gemologist and has a lot of inventory and I really appreciated... his time and professional manner. His prices were more than double that I was offered anywhere else and right in line with one other place I would definitely go back to him because he is fair and honest. I feel he is more of an expert and has lots of knowledge he was a pleasure to work with and highly ethical. I will make purchases as well as sell again to him and likely won’t go elsewhere from now on. Very fair and beyond double what others offered besides the one place who really were not gem experts.read more