Oval|Natural|GIA

1.21ct D SI1 Oval Natural Diamond

EX • D/SI1 • GIA 6542388209

Certificate GIA 6542388209

Diamond specifications and retailer prices

From £2,916 GBP
As of November 5, 2026
Save £2,509 GBP (46%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £5,950 GBP at NZ Jewellers · As of October 23, 2026
View at NZ Jewellers

About this 1.21ct natural oval diamond

This 1.21ct natural oval 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 6542388209. Listed at 16 retailers as of November 4, 2026, with a 86% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
OriginNatural
Grading LabGIA
CertificateGIA 6542388209
Dimensions8.23 × 5.94 × 3.75 mm
L/W Ratio1.39
Top View
8.23 mm5.94 mm1.21 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6542388209
Side View
Table 62.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 63.2%

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 5
Current: £5,950 GBP|Low: £2,916 GBP|High: £5,950 GBP|Avg: £3,761 GBP
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
Retailer 14
Retailer 15
Retailer 16
November 6, 2026
Retailer 13£2,916 GBP
Retailer 7£2,979 GBP
Retailer 3£3,152 GBP
Retailer 16£3,231 GBP
Retailer 2£3,313 GBP
Retailer 10£3,363 GBP
Retailer 5£3,415 GBP
Retailer 14£3,415 GBP
Retailer 15£3,415 GBP
Retailer 8£3,506 GBP
Retailer 4£3,573 GBP
Retailer 9£3,842 GBP
Retailer 6£3,940 GBP
Retailer 11£4,167 GBP
Retailer 12£5,425 GBP
NZ Jewellers£5,950 GBP

31 data points across 16 retailers

16 retailers£2,916 GBP to £5,425 GBP

B+
Cheapest Retailer
-
£2,916 GBP
B+
Retailer 2
-
£2,979 GBP
View
B+
Retailer 3
-
£3,152 GBP
View
Final sale: no returns
B+
Retailer 4
-
£3,231 GBP
View
B+
Retailer 5
-
£3,313 GBP
View
B+
Retailer 6
-
£3,363 GBP
View
Retailer 7
-
£3,415 GBP
View
Price last confirmed 12 days ago
Retailer 8
-
£3,415 GBP
View
Price last confirmed 12 days ago
Retailer 9
-
£3,415 GBP
View
Price last confirmed 11 days ago
Retailer 10
-
£3,506 GBP
View
Price last confirmed 28 days ago
B+
Retailer 11
-
£3,573 GBP
View
B+
Retailer 12
-
£3,842 GBP
View
Retailer 13
-
£3,940 GBP
View
Price last confirmed 14 days ago
B+
Retailer 14
-
£4,167 GBP
View
B
Retailer 15
-
£5,425 GBP
View
Most Expensive
NZ Jewellers
aa22a294-41c5-4041-bda9-a3e21c25432e · Oct 23
£5,950 GBP
$7,964 USD
View
Price last confirmed 13 days ago
15 more retailers have this diamond
Prices start from £2,916 GBPSave up to £2,509 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 Oval
£2,916 GBP