Round|Natural|GIA

1.26ct J SI2 Round Natural Diamond

EX • J/SI2 • GIA 2557492173

Certificate GIA 2557492173

Diamond specifications and retailer prices

From £1,339 GBP
As of November 1, 2026
Save £1,099 GBP (45%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £3,280 GBP at NZ Jewellers · As of September 27, 2026
View at NZ Jewellers

About this 1.26ct natural round diamond

This 1.26ct natural round sits in the one-and-a-quarter to one-and-a-half carat band, graded J colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2557492173. Listed at 9 retailers as of November 1, 2026, with a 82% 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

1.26
Carat
J
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 2557492173
Dimensions6.97 × 7.00 × 4.19 mm
L/W Ratio1.00
Top View
6.97 mm7.00 mm1.26 ctJ / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2557492173
Side View
Table 60.0%CrownGirdlePavilionCuletDepth 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 1
Current: £1,517 GBP|Low: £1,242 GBP|High: £2,450 GBP|Avg: £1,588 GBP|+3.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 2, 2026
Retailer 7£1,299 GBP
Retailer 3£1,339 GBP
Retailer 5£1,397 GBP
Retailer 6£1,494 GBP
Retailer 1£1,517 GBP
Retailer 2£1,891 GBP
Retailer 4£2,438 GBP

40 data points across 7 retailers

9 retailers£1,339 GBP to £2,438 GBP

Retailer 1
-
£1,299 GBP
$1,740 USD
Price last confirmed 37 days ago
A
Retailer 2
-
£1,339 GBP
View
A
Retailer 3
-
£1,397 GBP
$1,872 USD
View
B+
Retailer 4
-
£1,494 GBP
$2,002 USD
View
B+
Retailer 5
-
£1,517 GBP
View
B+
Retailer 6
-
£1,891 GBP
€2,413 EUR
View
B
Retailer 7
-
£2,438 GBP
View
Retailer 8
-
£3,132 GBP
$4,197 USD
View
Price last confirmed 18 days ago
Most Expensive
NZ Jewellers
a70bc76f-cb8c-43c4-bfa5-7c9d6c087777 · Sep 27
£3,280 GBP
$4,395 USD
View
Price last confirmed 35 days ago
8 more retailers have this diamond
Prices start from £1,339 GBPSave up to £1,099 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
1.26ct Round
£1,339 GBP