Where the Round Brilliant Market Sits in 2026
The round is the most graded, most liquid, most benchmarked diamond in the market — and the shape lab-grown has commoditised hardest, now making up over half of US engagement-ring centres at 80-90% less than natural. The market has split sharply: premium and larger naturals (2ct+) have held firm on genuine scarcity, while commercial bridal sizes repriced downward under lab-grown pressure before a measured 2026 recovery began. The takeaway is specific — a round is no longer “just a round.” The value has moved to make and sourcing, which is exactly where a knowledgeable desk earns its keep.
Make Is the Edge: 3EX and Hearts & Arrows
Triple-Excellent — cut, polish, symmetry — is the baseline any serious round should start from. But Excellent is a band, not a point, and two legitimately Excellent stones can favour brilliance, fire, or scintillation differently depending on where they sit within it. Above 3EX sits Hearts & Arrows — a superideal tier cut to a precision that shows eight even arrows and hearts under a dedicated viewer. We evaluate every round beyond its grade: proportion combination, fluorescence behaviour on the actual stone, polish within the band, girdle thickness, and performance under multiple light sources.
Certified Single Stones
For solitaires and centrepiece commissions, we supply GIA-certified natural rounds across every size, colour, and clarity — each read for where it sits within its grade and priced accordingly.
Calibrated Parcels for Layouts
Pavé, halos, tennis bracelets, and eternity bands run on consistency, not certificates. Two rounds at the same certified weight can face up at different diameters if depths differ. We supply calibrated parcels matched for diameter, colour, and fluorescence — not merely sorted to size.
Matched Pairs
Identical grades are not a matched pair. Two Excellent rounds at the same colour and clarity can still differ in brilliance character, colour temperature, and face-up diameter. Fluorescence is where pairs most often fail — matched grades with different fluorescence read unevenly under UV-rich light. We match stone beside stone under consistent light before anything is confirmed.
Loose Parcels: Melee to One Carat and Up
| Category | Range We Supply |
| Sieve goods | -2, stars, melee, +11 and +14 sizes |
| Pointers | 18 to 99 points (0.18–0.99 ct) |
| One carat and up | Certified and non-certified loose parcels |
| Clarity | FL to I1 |
| Colour | D to Z |
A category lab-grown serves poorly at the consistency a fine line needs — and we price it sharply.
Shade Goods and Fancy Colours
TTLB and other light-brown shade goods often face up white, particularly in yellow gold, trading well below equivalent face-up-white stones. We also supply natural fancy-colour rounds for clients wanting colour in the benchmark shape.
Specialised Faceting
Beyond the standard 57/58-facet round, we source modified multi-facet rounds engineered for specific light-performance signatures, including proprietary branded faceting patterns.
Pricing
Round is the most transparent stone in the trade — Rapaport sets the benchmark. We price against live Rap conditions, not static markups, and we’ll tell you plainly when fluorescence is being mispriced as a discount opportunity rather than a flaw.
FAQ
What’s the difference between 3EX and Hearts & Arrows?
3EX is triple-Excellent — the baseline for a fine round. Hearts & Arrows is a superideal tier above it, cut precisely enough to show eight arrows and hearts under a dedicated viewer. Every H&A is 3EX; most 3EX isn’t H&A.
Does Excellent guarantee the best light performance?
No — it’s a reliable filter, not a finish line. Excellent covers a range of proportions, and where a stone sits within that range determines its real performance.
What loose parcels do you supply?
The full range — sieve sizes through melee, pointers from 18 to 99 points, and certified or non-certified parcels at a carat and up, across FL-I1 and D-Z.
What are TTLB shade goods?
Near-white naturals with a faint warm shade that often face up white, especially in yellow gold, priced well below equivalent white stones — strong value for the right setting.
Can you match pairs and calibrate layouts?
Yes. We match on face-up diameter, colour, fluorescence, and brilliance together, side by side, because identical grades alone don’t make a pair.
Do you supply branded faceting cuts?
Yes — modified, multi-facet rounds engineered for specific light performance, evaluated at the level the cut is engineered to.
How does Raremonds price rounds?
Against live Rapaport conditions, not static markups — and we’ll tell you plainly when a quote sits above or below market, and why.
.png){kind=small}