Find Your Perfect Diamond
Made to sit flush against the engagement ring it was designed for.
Every ring is made from start to finish in our Los Angeles atelier.
A rough diamond does not sparkle. It arrives from the earth as a scarred, glassy pebble, and everything you love about a finished stone, the blaze, the rainbow flashes, the life in motion, is put there by geometry. This is the optics of brilliance, explained plainly: what the light is doing, and what has to go right for it to do it.
Every facet on a diamond is a mirror, cut to a specific size for its position and aligned with its neighbors. Together they form a relay: light enters through the crown, ricochets across the pavilion facets at the bottom, and is returned through the top to your eye. When the proportions are right, almost nothing escapes, and the stone reads as pure concentrated light. When an angle is wrong, light slips out the back or the sides, and no color or clarity grade can buy it back.
This is why cut is the most important of the 4Cs, and why two diamonds with identical certificates can look like different species in person. The paper describes the mirrors. Only the light shows whether the relay works.
What your eye reads as sparkle is three distinct optical events happening at once. Brilliance is the white light returned to the eye, the raw brightness of the relay working. Fire is dispersion: the diamond behaving as a prism, splitting white light into flashes of spectral color that flicker in the stone like flame. Scintillation is the light in motion, the on and off pattern of flashes as the diamond, the light source, or you move, the quality that makes a well cut stone look alive on a hand rather than in a case.
A fine cut balances all three. Lean too far toward one, as some proportion sets do, and the others pay for it. This is also why judging a diamond from a still photograph is nearly useless: brilliance photographs, but fire and scintillation only exist in motion, which is why we insist on video of the actual stone before anyone commits.
Polish describes the care and precision with which the facets were finished, and the engine analogy earns its keep here. Imagine a properly cut diamond as an engine with every cylinder firing: each facet placed at its exact angle, meeting its neighbors at crisp junctions, its surface burnished clean of wheel marks. Misshapen or misaligned facets misfire, and the stone visibly loses power, because a flawed mirror wastes the light it was built to relay.
On a certificate, polish and symmetry appear as their own grades alongside cut. On a fine stone they should read Excellent, and on any stone we recommend they do. It is the least glamorous line on the report and one of the most honest predictors of how the diamond will actually behave in light.
Roughly a quarter to a third of diamonds emit a soft blue glow under ultraviolet light, an atomic excitation called fluorescence, graded from None through Very Strong. It is one of the most misunderstood words in the business. Because laboratories grade color in UV filtered light, the effect is already accounted for in the grade on your certificate, and in daylight a touch of blue fluorescence can actually make a slightly warm stone face up whiter.
Only at the strong end can fluorescence work against a stone, occasionally lending a hazy or oily cast. The honest rule: never pay a premium or demand one over the word alone. Judge the individual stone in video and honest light, because fluorescence describes a population tendency, and you are buying exactly one diamond.
Fancy color diamonds live on a different scale entirely. Rather than being graded for the absence of color, they are described by its strength, ascending through terms like Faint, Light, Intense, Vivid, and Deep. There, the more saturated the color, the rarer and more valuable the stone, the colorless logic in reverse.
Brilliance can be manufactured dishonestly as well as earned. Modern treatments can bleach inclusions, fill fractures, and alter color with heat and irradiation. Here is how we keep all of it out of your ring.
Every diamond we offer passes thorough laboratory scrutiny and carries GIA or IGI paper confirming it is untreated. Clarity enhanced and color enhanced stones are simply not in our inventory.
Our laboratory grown diamonds are real diamonds, certified and inscribed as laboratory grown by the same laboratories. Identity is never a surprise here, in either direction.
ROSI™, our gemological intelligence, built by our gemologists, reads the full certificate, proportions and polish included, and scores how the stone will actually perform in light before we recommend it.
Weighing a diamond anywhere? Request a ROSI™ Score Report on its certificate number and see exactly how its cut, polish, and price stack up against the live market.
Nature supplies the crystal. Everything you will actually fall in love with is decided on the cutting wheel.
The practical lesson of the optics is simple: prioritize cut, trust polish and symmetry grades as its supporting evidence, treat fluorescence as a detail to check rather than a verdict, and never buy the stone without seeing it move. A diamond is a machine for returning light. Buy the one that was built well.
Found a diamond you are considering, here or anywhere else? Send the GIA or IGI certificate number and our gemological team returns its ROSI™ Score and a read of where it sits in the current market. Complimentary, within minutes.
Score a DiamondWhere stones of the same exact specifications are trading on the open market right now. You get a straight answer, even when the diamond is not ours.
John Anderson, our Lead Gemologist, evaluates the light performance of diamonds every day and will walk you through video of any stone you are considering, ours or anyone else's, pointing out exactly what its brilliance, fire, and scintillation are telling you. The consultation is complimentary and there is no obligation.
1-800-779-1726