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Radiant|Natural|GIA

1.21ct H SI2 Radiant Natural Diamond

GD • H/SI2 • GIA 6552938549

Certificate GIA 6552938549

Diamond specifications and retailer prices

From £2,555 GBP
As of November 5, 2026
Save £82 GBP (3%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £2,637 GBP at Jared · As of November 6, 2026
View at Jared

About this 1.21ct natural radiant diamond

This 1.21ct natural radiant sits in the classic one-carat band, graded H colour (near-colourless) and SI2 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 6552938549. Listed at 3 retailers as of November 6, 2026, with a relatively tight 3% spread, which is unusual at this carat range and suggests competitive pricing across the listings. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.21
Carat
H
Colour
SI2
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle52.62°
Pavilion angle37.82°
OriginNatural
Grading LabGIA
CertificateGIA 6552938549
Dimensions7.44 × 5.12 × 3.46 mm
L/W Ratio1.45
Girdle conditionPolished
Key to symbols
Twinning Wisp, Feather
Top View
7.44 mm5.12 mm1.21 ctH / SI2
OriginNatural
CutGood
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6552938549
Side View
Table 68.0%Crown 52.62°Girdle: THK-VTKPavilion 37.82°Culet: NoneDepth 67.6%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Nov 5
Current: £2,637 GBP|Low: £1,788 GBP|High: £2,637 GBP|Avg: £2,264 GBP
Jared
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
September 11, 2026
Retailer 6£1,788 GBP
Retailer 5£2,366 GBP
Retailer 4£2,397 GBP
Retailer 2£2,555 GBP
Retailer 3£2,555 GBP
Jared£2,637 GBP

5 data points across 6 retailers

3 retailers£2,555 GBP to £2,637 GBP

B
Cheapest Retailer
-
£2,555 GBP
B
Retailer 2
-
£2,555 GBP
View
Most Expensive
B
Jared
159836677 · Nov 6
£2,637 GBP
$3,530 USD
View
2 more retailers have this diamond
Prices start from £2,555 GBPSave up to £82 GBP

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

B
1.21ct Radiant
£2,555 GBP