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Oval|Natural|GIA

1.21ct D SI1 Oval Natural Diamond

VG • D/SI1 • GIA 1525373512

Certificate GIA 1525373512

Diamond specifications and retailer prices

From £3,414 GBP
As of November 6, 2026
Save £4,191 GBP (55%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £7,604 GBP at NZ Jewellers · As of October 17, 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 very-good cut grade stated by the retailer rather than the lab and certified by GIA 1525373512. Listed at 19 retailers as of November 5, 2026, with a 123% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
D
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1525373512
Dimensions8.12 × 5.86 × 3.79 mm
L/W Ratio1.39
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Needle
Top View
8.12 mm5.86 mm1.21 ctD / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1525373512
Side View
Table 58.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 64.7%

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 6
Current: £7,604 GBP|Low: £3,385 GBP|High: £7,604 GBP|Avg: £5,007 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
November 6, 2026
Retailer 13£3,414 GBP
Retailer 6£4,055 GBP
Retailer 3£4,291 GBP
Retailer 8£4,319 GBP
Retailer 2£4,410 GBP
Retailer 5£4,518 GBP
Retailer 11£4,650 GBP
Retailer 12£4,650 GBP
Retailer 4£4,660 GBP
Retailer 7£4,678 GBP
Retailer 14£5,365 GBP
Retailer 9£5,547 GBP
Retailer 10£6,679 GBP
NZ Jewellers£7,604 GBP

41 data points across 14 retailers

19 retailers£3,414 GBP to £7,604 GBP

B+
Cheapest Retailer
-
£3,414 GBP
B
Retailer 2
-
£4,055 GBP
View
Retailer 3
-
£4,159 GBP
View
Price last confirmed 81 days ago
B
Retailer 4
-
£4,291 GBP
View
Final sale: no returns
B
Retailer 5
-
£4,319 GBP
View
B
Retailer 6
-
£4,326 GBP
View
B
Retailer 7
-
£4,410 GBP
View
Retailer 8
-
£4,518 GBP
View
Price last confirmed 33 days ago
B
Retailer 9
-
£4,650 GBP
View
B
Retailer 10
-
£4,650 GBP
View
B
Retailer 11
-
£4,660 GBP
View
B
Retailer 12
-
£4,663 GBP
View
B
Retailer 13
-
£4,678 GBP
View
Retailer 14
-
£5,245 GBP
View
Price last confirmed 66 days ago
B
Retailer 15
-
£5,365 GBP
View
B
Retailer 16
-
£5,547 GBP
View
B
Retailer 17
-
£6,679 GBP
View
B
Retailer 18
-
£7,604 GBP
View
Most Expensive
NZ Jewellers
2ec539e1-1b40-40c3-9c86-2a9cdc662e84 · Oct 17
£7,604 GBP
$10,178 USD
View
Price last confirmed 20 days ago
18 more retailers have this diamond
Prices start from £3,414 GBPSave up to £4,191 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
£3,414 GBP