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Radiant|Natural|GIA

1.21ct D SI1 Radiant Natural Diamond

EX • D/SI1 • GIA 1443103827

Certificate GIA 1443103827

Diamond specifications and retailer prices

From £3,102 GBP
As of November 6, 2026
Save £3,766 GBP (55%) vs most expensive(unlock to see where)
29 retailers carry this diamond
Most expensive: £6,868 GBP at NZ Jewellers · As of November 5, 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 1443103827. Listed at 29 retailers as of November 5, 2026, with prices from £3,102 to £6,868, a £3,766 spread on the same certified stone. NZ Jewellers lists it at £6,868. 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
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 1443103827
Dimensions6.70 × 5.35 × 3.73 mm
L/W Ratio1.25
Culet sizeNone
Top View
6.70 mm5.35 mm1.21 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 1443103827
Side View
Table 66.0%CrownGirdle: ThickPavilionCulet: NoneDepth 69.6%

Caratlytics Score

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

Price History

Last verified: Nov 6
Current: £3,967 GBP|Low: £3,271 GBP|High: £6,619 GBP|Avg: £4,350 GBP|-1.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 7, 2026
Retailer 8£3,271 GBP
Retailer 6£3,463 GBP
Retailer 1£3,967 GBP
Retailer 2£3,984 GBP
Retailer 7£4,140 GBP
Retailer 3£4,620 GBP
Retailer 4£5,010 GBP
Retailer 5£6,523 GBP

37 data points across 8 retailers

29 retailers£3,102 GBP to £6,868 GBP

B+
Cheapest Retailer
-
£3,102 GBP
B+
Retailer 2
-
£3,208 GBP
View
B+
Retailer 3
-
£3,244 GBP
View
B+
Retailer 4
-
£3,271 GBP
View
Final sale: no returns
B+
Retailer 5
-
£3,284 GBP
View
B+
Retailer 6
-
£3,387 GBP
View
B+
Retailer 7
-
£3,463 GBP
View
B+
Retailer 8
-
£3,488 GBP
View
B+
Retailer 9
-
£3,500 GBP
View
B
Retailer 10
-
£3,686 GBP
View
Retailer 11
-
£3,721 GBP
View
Price last confirmed 9 days ago
B
Retailer 12
-
£3,721 GBP
View
B
Retailer 13
-
£3,721 GBP
View
B
Retailer 14
-
£3,784 GBP
View
B
Retailer 15
-
£3,967 GBP
View
B
Retailer 16
-
£3,984 GBP
View
B
Retailer 17
-
£4,055 GBP
View
Retailer 18
-
£4,140 GBP
View
Price last confirmed 29 days ago
B
Retailer 19
-
£4,169 GBP
View
B
Retailer 20
-
£4,169 GBP
View
B
Retailer 21
-
£4,293 GBP
View
B
Retailer 22
-
£4,311 GBP
View
Retailer 23
-
£4,531 GBP
View
Price last confirmed 15 days ago
B
Retailer 24
-
£4,620 GBP
View
B
Retailer 25
-
£4,730 GBP
View
B
Retailer 26
-
£5,010 GBP
View
B
Retailer 27
-
£5,946 GBP
View
B
Retailer 28
-
£6,523 GBP
View
Most Expensive
B
NZ Jewellers
9a27df5b-79d0-4380-aa40-91ee1a47bf2e · Nov 5
£6,868 GBP
$9,193 USD
View
28 more retailers have this diamond
Prices start from £3,102 GBPSave up to £3,766 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
£3,102 GBP