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Radiant|Natural|GIA

1.21ct D SI1 Radiant Natural Diamond

EX • D/SI1 • GIA 1548626456

Certificate GIA 1548626456

Diamond specifications and retailer prices

From £2,215 GBP
As of November 3, 2026
Save £1,744 GBP (44%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £3,959 GBP at NZ Jewellers · As of November 3, 2026
View at NZ Jewellers

About this 1.21ct natural radiant diamond

This 1.21ct natural radiant sits in the classic one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1548626456. Listed at 8 retailers as of November 3, 2026, with prices from £2,215 to £3,959, a £1,744 spread on the same certified stone. NZ Jewellers lists it at £3,959. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.21
Carat
D
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle54.45°
Pavilion angle34.68°
OriginNatural
Grading LabGIA
CertificateGIA 1548626456
Dimensions6.81 × 5.33 × 3.71 mm
L/W Ratio1.28
Girdle conditionThick
Key to symbols
Crystal, Pinpoint
Top View
6.81 mm5.33 mm1.21 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1548626456
Side View
Table 72.0%Crown 54.45°Girdle: ThickPavilion 34.68°Culet: NoneDepth 69.6%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 3
Current: £3,959 GBP|Low: £2,215 GBP|High: £4,055 GBP|Avg: £2,745 GBP|-2.4%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 2, 2026
Retailer 9£2,215 GBP
Retailer 2£2,216 GBP
Retailer 8£2,273 GBP
Retailer 7£2,360 GBP
Retailer 11£2,384 GBP
Retailer 10£2,427 GBP
Retailer 5£2,564 GBP
Retailer 4£2,580 GBP
Retailer 13£2,672 GBP
Retailer 12£2,705 GBP
Retailer 3£2,835 GBP
Retailer 6£3,800 GBP
NZ Jewellers£3,959 GBP

34 data points across 13 retailers

8 retailers£2,215 GBP to £3,959 GBP

A
Cheapest Retailer
-
£2,215 GBP
A
Retailer 2
-
£2,216 GBP
View
A
Retailer 3
-
£2,273 GBP
View
A
Retailer 4
-
£2,360 GBP
View
A
Retailer 5
-
£2,384 GBP
View
Retailer 6
-
£2,427 GBP
View
Price last confirmed 31 days ago
B
Retailer 7
-
£3,800 GBP
View
Most Expensive
B
NZ Jewellers
b32c0587-4dbb-4cc1-b33c-78e9665a1bb0 · Nov 3
£3,959 GBP
$5,299 USD
View
7 more retailers have this diamond
Prices start from £2,215 GBPSave up to £1,744 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.

A
1.21ct Radiant
£2,215 GBP