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Round|Natural|GIA

1.20ct J SI2 Round Natural Diamond

EX • J/SI2 • GIA 2537779753

Certificate GIA 2537779753

Diamond specifications and retailer prices

From £1,369 GBP
As of November 6, 2026
Save £1,754 GBP (56%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £3,777 GBP at NZ Jewellers · As of September 28, 2026
View at NZ Jewellers

About this 1.2ct natural round diamond

This 1.2ct natural round sits in the classic one-carat band, graded J colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2537779753. Listed at 18 retailers as of November 4, 2026, with a 128% 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
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 2537779753
Dimensions6.83 × 6.79 × 4.19 mm
L/W Ratio1.01
Top View
6.83 mm6.79 mm1.20 ctJ / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2537779753
Side View
Table 59.0%Crown 34°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 61.5%

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: £1,424 GBP|Low: £1,360 GBP|High: £3,203 GBP|Avg: £1,902 GBP|-2.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 6, 2026
Retailer 2£1,369 GBP
Retailer 1£1,424 GBP
Retailer 7£1,599 GBP
Retailer 10£1,650 GBP
Retailer 3£1,701 GBP
Retailer 4£1,807 GBP
Retailer 12£1,843 GBP
Retailer 9£1,881 GBP
Retailer 5£1,892 GBP
Retailer 6£1,907 GBP
Retailer 8£2,218 GBP
Retailer 11£3,124 GBP

38 data points across 12 retailers

18 retailers£1,369 GBP to £3,124 GBP

A
Cheapest Retailer
-
£1,369 GBP
A
Retailer 2
-
£1,424 GBP
View
A
Retailer 3
-
£1,599 GBP
View
B+
Retailer 4
-
£1,650 GBP
View
Final sale: no returns
B+
Retailer 5
-
£1,701 GBP
View
B+
Retailer 6
-
£1,713 GBP
View
Retailer 7
-
£1,807 GBP
View
Price last confirmed 39 days ago
Retailer 8
-
£1,807 GBP
View
Price last confirmed 36 days ago
B+
Retailer 9
-
£1,843 GBP
View
B+
Retailer 10
-
£1,881 GBP
View
Retailer 11
-
£1,890 GBP
View
Price last confirmed 38 days ago
B+
Retailer 12
-
£1,892 GBP
View
B+
Retailer 13
-
£1,907 GBP
View
Retailer 14
-
£2,085 GBP
View
Price last confirmed 38 days ago
B+
Retailer 15
-
£2,218 GBP
View
B
Retailer 16
-
£3,124 GBP
View
Retailer 17
-
£3,777 GBP
View
Price last confirmed 34 days ago
Most Expensive
NZ Jewellers
1419a2b3-5131-4a5f-b6a5-38c01a255356 · Sep 28
£3,777 GBP
$5,084 USD
View
Price last confirmed 39 days ago
17 more retailers have this diamond
Prices start from £1,369 GBPSave up to £1,754 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 Round
£1,369 GBP