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Radiant|Natural|GIA

1.21ct I SI1 Radiant Natural Diamond

VG • I/SI1 • GIA 5516329413

Certificate GIA 5516329413

Diamond specifications and retailer prices

From £2,624 GBP
A$5,418 AUD
As of November 1, 2026
Save £973 GBP (27%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £3,597 GBP at 77 Diamonds · As of November 1, 2026
View at 77 Diamonds

About this 1.21ct natural radiant diamond

This 1.21ct natural radiant sits in the classic one-carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 5516329413. Listed at 3 retailers as of November 1, 2026, with prices from £2,624 to £3,597, a £973 spread on the same certified stone. 77 Diamonds lists it at £3,597. 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
I
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 5516329413
Dimensions6.86 × 5.44 × 3.52 mm
L/W Ratio1.26
Top View
6.86 mm5.44 mm1.21 ctI / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 5516329413
Side View
Table 73.0%CrownGirdlePavilionCuletDepth 64.7%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: £3,597 GBP|Low: £2,624 GBP|High: £3,627 GBP|Avg: £3,051 GBP|+4.1%
77 Diamonds
Retailer 2
Retailer 3
November 1, 2026
Retailer 2£2,624 GBP
Retailer 3£2,647 GBP
77 Diamonds£3,597 GBP

37 data points across 3 retailers

3 retailers£2,624 GBP to £3,597 GBP

B
Cheapest Retailer
-
£2,624 GBP
A$5,418 AUD
B
Retailer 2
-
£2,647 GBP
CA$4,934 CAD
View
Most Expensive
C
77 Diamonds
RADMBXYNFYQEZ · Nov 1
£3,597 GBP
View
2 more retailers have this diamond
Prices start from £2,624 GBPSave up to £973 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
£2,624 GBP