Where the Radiant Sits in 2026
The radiant rides the year’s appetite for brilliance with an edge — among the more-chosen fancy shapes by sales, with the long radiant (elongated, lengthening the finger while keeping the fire) in particular demand. Trimmed corners make it more forgiving in wear than a sharp-cornered princess. Commercially, its biggest role is in colour — along with cushion and oval, it’s one of the premier coloured-diamond shapes, its brilliant faceting trapping and intensifying hue. A great many yellows and other coloured diamonds are cut as radiants specifically to show colour at its strongest.
What GIA’s Report Covers — and What It Doesn’t
GIA issues no cut grade for radiant, and unlike marquise, oval, and pear, it isn’t in the first wave of incoming fancy-shape cut grades from 2027 — there’s no cut grade coming for this shape. Polish, symmetry, measurements, depth, and table are on the report; how a radiant actually performs and carries colour is a matter of seeing the stone.
What Actually Matters When You’re Buying a Radiant
Brilliance and faceting character — ranges from bold broad-flash sparkle to finer crushed-ice shimmer; should be even and lively, not muddy. The outline — square radiants sit near 1.00-1.05 ratio; long radiants run above 1.10 and are in stronger demand, with even, symmetrical cropped corners. Windowing and depth — too deep darkens; too shallow windows. Bow-tie in long stones — can carry one down its length; check if dynamic or fixed. Colour — holds colour a little more than round in white goods, making placement matter; in colour stones, how evenly the cut carries hue is the heart of the evaluation.
Certified Single Stones
For solitaires and centrepieces, we supply GIA-certified natural radiants across sizes, colours, clarities, ratios, and faceting characters — square and long — evaluated in hand in both white and colour.
Loose Parcels and Calibrated Goods
| Category | Range We Supply |
| Small/melee goods | Calibrated small radiant goods through melee |
| 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 |
Consistent make and faceting character through the parcel, calibrated dimension where a layout needs it.
Matched Pairs
Matched on faceting character, outline, ratio, colour, and fluorescence together — a bold radiant beside a crushed-ice one, or one running warmer, reads as mismatched once set however close the grades. Nothing is confirmed as a pair until both stones are seen side by side under one light.
Shades and Coloured Diamonds
TTLB and other light-brown shade goods often face up well, especially in yellow gold, at real discount to D-Z stones. More central to this shape: natural coloured-diamond radiants, where the faceting concentrates colour, making it one of the premier shapes for yellows and other coloured diamonds.
Pricing
Radiant trades below round per carat and cuts efficiently, offering real value. The spread within radiant runs on make, outline, and for colour, how well the cut carries hue. We price against current market conditions and tell you plainly what a number actually reflects.
FAQ
Why is radiant so popular for coloured diamonds?
Its brilliant faceting concentrates and intensifies body colour — one of the best shapes for showing colour at its richest, yellows especially, which is why we source it heavily in colour.
What’s the difference between a radiant and a princess?
Both are cornered brilliant cuts, but radiant has cropped corners that resist chipping and faceting tuned for more fire. Princess has sharp, vulnerable corners and a squarer character. Radiant is generally more durable and versatile.
Does GIA grade radiant cut?
No, and radiant isn’t in GIA’s 2027 cut-grade rollout — no grade is coming. Brilliance, outline, and colour behaviour have to be seen, not read.
What sizes do you supply?
The full range — calibrated small goods through melee, pointers 0.18 to 0.99ct, and certified or non-certified parcels at a carat and up across FL-I1 and D-Z, plus shade goods and a deep coloured-diamond offering.
Do you supply matched pairs and layouts?
Yes — single stones, matched pairs, and layouts, matched in hand on faceting character, outline, ratio, colour, and fluorescence before confirmation.
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