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Round|Natural|GIA

1.20ct J SI2 Round Natural Diamond

EX • J/SI2 • GIA 2554750922

Certificate GIA 2554750922

Diamond specifications and retailer prices

From £1,215 GBP
As of November 6, 2026
Save £1,693 GBP (58%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £3,511 GBP at NZ Jewellers · As of October 3, 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 2554750922. Listed at 21 retailers as of November 4, 2026, with a 139% 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
FluorescenceFaint
Crown angle36°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 2554750922
Dimensions6.69 × 6.73 × 4.27 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizeNone
Top View
6.69 mm6.73 mm1.20 ctJ / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2554750922
Side View
Table 56.0%Crown 36°Girdle: THN-STKPavilion 41.2°Culet: NoneDepth 63.7%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £1,349 GBP|Low: £1,207 GBP|High: £2,978 GBP|Avg: £1,720 GBP|-1.0%
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
November 6, 2026
Retailer 6£1,215 GBP
Retailer 7£1,264 GBP
Retailer 4£1,265 GBP
Retailer 1£1,349 GBP
Retailer 13£1,379 GBP
Retailer 3£1,388 GBP
Retailer 5£1,411 GBP
Retailer 9£1,577 GBP
Retailer 8£1,719 GBP
Retailer 2£1,739 GBP
Retailer 15£1,739 GBP
Retailer 11£1,781 GBP
Retailer 10£1,791 GBP
Retailer 14£2,012 GBP
Retailer 12£2,099 GBP
Retailer 16£2,908 GBP

27 data points across 16 retailers

21 retailers£1,215 GBP to £2,908 GBP

A
Cheapest Retailer
-
£1,215 GBP
Retailer 2
-
£1,264 GBP
View
Price last confirmed 22 days ago
A
Retailer 3
-
£1,265 GBP
View
A
Retailer 4
-
£1,349 GBP
View
A
Retailer 5
-
£1,379 GBP
View
Final sale: no returns
A
Retailer 6
-
£1,388 GBP
View
A
Retailer 7
-
£1,411 GBP
View
A
Retailer 8
-
£1,577 GBP
View
Retailer 9
-
£1,664 GBP
View
Price last confirmed 21 days ago
Retailer 10
-
£1,680 GBP
View
Price last confirmed 29 days ago
Retailer 11
-
£1,719 GBP
View
Price last confirmed 21 days ago
B+
Retailer 12
-
£1,739 GBP
View
B+
Retailer 13
-
£1,739 GBP
View
Retailer 14
-
£1,741 GBP
View
Price last confirmed 22 days ago
B+
Retailer 15
-
£1,781 GBP
View
B+
Retailer 16
-
£1,791 GBP
View
Retailer 17
-
£1,920 GBP
View
Price last confirmed 21 days ago
B+
Retailer 18
-
£2,012 GBP
View
B+
Retailer 19
-
£2,099 GBP
View
B
Retailer 20
-
£2,908 GBP
View
Most Expensive
NZ Jewellers
e55c1379-2256-414d-a26b-5ea956badb91 · Oct 3
£3,511 GBP
$4,726 USD
View
Price last confirmed 34 days ago
20 more retailers have this diamond
Prices start from £1,215 GBPSave up to £1,693 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
£1,215 GBP