Oval|Natural|GIA

1.20ct J SI1 Oval Natural Diamond

EX • J/SI1 • GIA 6233809481

Certificate GIA 6233809481

Diamond specifications and retailer prices

From £1,281 GBP
As of November 6, 2026
Save £1,686 GBP (57%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £3,592 GBP at NZ Jewellers · As of September 25, 2026
View at NZ Jewellers

About this 1.2ct natural oval diamond

This 1.2ct natural oval sits in the classic one-carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6233809481. Listed at 20 retailers as of November 4, 2026, with a 132% 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

1.20
Carat
J
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Pavilion angle40.1°
OriginNatural
Grading LabGIA
CertificateGIA 6233809481
Dimensions8.57 × 6.07 × 3.64 mm
L/W Ratio1.41
Top View
8.57 mm6.07 mm1.20 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6233809481
Side View
Table 61.0%CrownGirdle: MED-THKPavilion 40.1°Culet: NoneDepth 59.9%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £2,588 GBP|Low: £1,198 GBP|High: £3,046 GBP|Avg: £1,792 GBP
Retailer 1
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
Retailer 17
November 6, 2026
Retailer 15£1,281 GBP
Retailer 7£1,402 GBP
Retailer 2£1,405 GBP
Retailer 3£1,420 GBP
Retailer 17£1,483 GBP
Retailer 4£1,501 GBP
Retailer 6£1,514 GBP
Retailer 9£1,624 GBP
Retailer 8£1,651 GBP
Retailer 10£1,672 GBP
Retailer 16£1,745 GBP
Retailer 12£1,850 GBP
Retailer 11£2,073 GBP
Retailer 5£2,089 GBP
Retailer 14£2,106 GBP
Retailer 1£2,588 GBP
Retailer 13£2,968 GBP

39 data points across 17 retailers

20 retailers£1,281 GBP to £2,968 GBP

A
Cheapest Retailer
-
£1,281 GBP
A
Retailer 2
-
£1,402 GBP
View
A
Retailer 3
-
£1,405 GBP
View
B+
Retailer 4
-
£1,420 GBP
View
Final sale: no returns
A
Retailer 5
-
£1,483 GBP
View
B+
Retailer 6
-
£1,501 GBP
View
B+
Retailer 7
-
£1,514 GBP
View
B+
Retailer 8
-
£1,624 GBP
View
B+
Retailer 9
-
£1,651 GBP
View
B+
Retailer 10
-
£1,672 GBP
View
B+
Retailer 11
-
£1,745 GBP
View
Retailer 12
-
£1,745 GBP
View
Price last confirmed 16 days ago
Retailer 13
-
£1,765 GBP
View
Price last confirmed 44 days ago
B+
Retailer 14
-
£1,850 GBP
View
B+
Retailer 15
-
£2,073 GBP
View
Retailer 16
-
£2,089 GBP
View
Price last confirmed 31 days ago
B+
Retailer 17
-
£2,106 GBP
View
B
Retailer 18
-
£2,588 GBP
View
B
Retailer 19
-
£2,968 GBP
View
Most Expensive
NZ Jewellers
6e9e7afd-638a-4393-b1f4-e16b02e56af2 · Sep 25
£3,592 GBP
$4,808 USD
View
Price last confirmed 42 days ago
19 more retailers have this diamond
Prices start from £1,281 GBPSave up to £1,686 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
1.20ct Oval
£1,281 GBP