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Radiant|Natural|GIA

1.21ct D SI1 Radiant Natural Diamond

EX • D/SI1 • GIA 2546545145

Certificate GIA 2546545145

Diamond specifications and retailer prices

From £2,816 GBP
As of November 2, 2026
Save £2,214 GBP (44%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £5,030 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 2546545145. Listed at 9 retailers as of November 2, 2026, with prices from £2,816 to £5,030, a £2,214 spread on the same certified stone. NZ Jewellers lists it at £5,030. 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 angle44.86°
Pavilion angle30.58°
OriginNatural
Grading LabGIA
CertificateGIA 2546545145
Dimensions6.73 × 5.27 × 3.61 mm
L/W Ratio1.28
Top View
6.73 mm5.27 mm1.21 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2546545145
Side View
Table 65.0%Crown 44.86°Girdle: Thick to Very ThickPavilion 30.58°Culet: NDepth 68.6%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: £5,030 GBP|Low: £2,761 GBP|High: £5,056 GBP|Avg: £3,403 GBP|-0.5%
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 7, 2026
Retailer 8£2,816 GBP
Retailer 2£2,888 GBP
Retailer 10£2,888 GBP
Retailer 12£2,996 GBP
Retailer 6£2,998 GBP
Retailer 11£3,092 GBP
Retailer 13£3,175 GBP
Retailer 3£3,194 GBP
Retailer 7£3,255 GBP
Retailer 4£3,302 GBP
Retailer 5£3,347 GBP
Retailer 9£4,829 GBP
NZ Jewellers£5,030 GBP

36 data points across 13 retailers

9 retailers£2,816 GBP to £5,030 GBP

B+
Cheapest Retailer
-
£2,816 GBP
B+
Retailer 2
-
£2,888 GBP
View
B+
Retailer 3
-
£2,888 GBP
View
B+
Retailer 4
-
£2,996 GBP
View
B+
Retailer 5
-
£2,998 GBP
View
Retailer 6
-
£3,092 GBP
View
Price last confirmed 30 days ago
B+
Retailer 7
-
£3,255 GBP
View
B
Retailer 8
-
£4,829 GBP
View
Most Expensive
B
NZ Jewellers
9b8fbcd2-e172-42d0-aa3f-7ebb04cf6ed0 · Nov 3
£5,030 GBP
$6,733 USD
View
8 more retailers have this diamond
Prices start from £2,816 GBPSave up to £2,214 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
£2,816 GBP